diff --git a/README.md b/README.md
index 5afad809..b5fdcb2f 100644
--- a/README.md
+++ b/README.md
@@ -43,6 +43,17 @@ In a local environment you should set only the `TEXT_TO_SPEECH_IAM_APIKEY` and `
 
 Once that is set up, the token can be used in your SDK request with the parameter `access_token`. See [this example](https://github.com/watson-developer-cloud/speech-javascript-sdk/blob/master/examples/static/microphone-streaming.html#L36).
 
+## Using with Angular
+
+Make sure `polyfills.ts` has following entries:
+
+```js
+(window as any).global = window;
+(window as any).process = require('process/browser');
+import 'zone.js/dist/zone';  // Included with Angular CLI.
+global.Buffer = global.Buffer || require('buffer').Buffer;
+```
+
 ## Changes
 
 See [CHANGELOG.md](CHANGELOG.md) for a complete list of changes.
diff --git a/package-lock.json b/package-lock.json
index 04ac3ca1..24b7d63a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -5,17 +5,17 @@
   "requires": true,
   "dependencies": {
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-      "version": "7.2.3",
-      "resolved": "https://registry.npmjs.org/@babel/cli/-/cli-7.2.3.tgz",
-      "integrity": "sha512-bfna97nmJV6nDJhXNPeEfxyMjWnt6+IjUAaDPiYRTBlm8L41n8nvw6UAqUCbvpFfU246gHPxW7sfWwqtF4FcYA==",
+      "version": "7.4.3",
+      "resolved": "https://registry.npmjs.org/@babel/cli/-/cli-7.4.3.tgz",
+      "integrity": "sha512-cbC5H9iTDV9H7sMxK5rUm18UbdVPNTPqgdzmQAkOUP3YLysgDWLZaysVAfylK49rgTlzL01a6tXyq9rCb3yLhQ==",
       "dev": true,
       "requires": {
-        "chokidar": "^2.0.3",
+        "chokidar": "^2.0.4",
         "commander": "^2.8.1",
         "convert-source-map": "^1.1.0",
         "fs-readdir-recursive": "^1.1.0",
         "glob": "^7.0.0",
-        "lodash": "^4.17.10",
+        "lodash": "^4.17.11",
         "mkdirp": "^0.5.1",
         "output-file-sync": "^2.0.0",
         "slash": "^2.0.0",
@@ -32,17 +32,17 @@
       }
     },
     "@babel/core": {
-      "version": "7.4.0",
-      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.4.0.tgz",
-      "integrity": "sha512-Dzl7U0/T69DFOTwqz/FJdnOSWS57NpjNfCwMKHABr589Lg8uX1RrlBIJ7L5Dubt/xkLsx0xH5EBFzlBVes1ayA==",
+      "version": "7.4.3",
+      "resolved": "https://registry.npmjs.org/@babel/core/-/core-7.4.3.tgz",
+      "integrity": "sha512-oDpASqKFlbspQfzAE7yaeTmdljSH2ADIvBlb0RwbStltTuWa0+7CCI1fYVINNv9saHPa1W7oaKeuNuKj+RQCvA==",
       "dev": true,
       "requires": {
         "@babel/code-frame": "^7.0.0",
         "@babel/generator": "^7.4.0",
-        "@babel/helpers": "^7.4.0",
-        "@babel/parser": "^7.4.0",
+        "@babel/helpers": "^7.4.3",
+        "@babel/parser": "^7.4.3",
         "@babel/template": "^7.4.0",
-        "@babel/traverse": "^7.4.0",
+        "@babel/traverse": "^7.4.3",
         "@babel/types": "^7.4.0",
         "convert-source-map": "^1.1.0",
         "debug": "^4.1.0",
@@ -191,9 +191,9 @@
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-      "resolved": "https://registry.npmjs.org/@babel/helper-module-transforms/-/helper-module-transforms-7.2.2.tgz",
-      "integrity": "sha512-YRD7I6Wsv+IHuTPkAmAS4HhY0dkPobgLftHp0cRGZSdrRvmZY8rFvae/GVu3bD00qscuvK3WPHB3YdNpBXUqrA==",
+      "version": "7.4.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-module-transforms/-/helper-module-transforms-7.4.3.tgz",
+      "integrity": "sha512-H88T9IySZW25anu5uqyaC1DaQre7ofM+joZtAaO2F8NBdFfupH0SZ4gKjgSFVcvtx/aAirqA9L9Clio2heYbZA==",
       "dev": true,
       "requires": {
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@@ -201,7 +201,7 @@
         "@babel/helper-split-export-declaration": "^7.0.0",
         "@babel/template": "^7.2.2",
         "@babel/types": "^7.2.2",
-        "lodash": "^4.17.10"
+        "lodash": "^4.17.11"
       }
     },
     "@babel/helper-optimise-call-expression": {
@@ -220,12 +220,12 @@
       "dev": true
     },
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-      "version": "7.0.0",
-      "resolved": "https://registry.npmjs.org/@babel/helper-regex/-/helper-regex-7.0.0.tgz",
-      "integrity": "sha512-TR0/N0NDCcUIUEbqV6dCO+LptmmSQFQ7q70lfcEB4URsjD0E1HzicrwUH+ap6BAQ2jhCX9Q4UqZy4wilujWlkg==",
+      "version": "7.4.3",
+      "resolved": "https://registry.npmjs.org/@babel/helper-regex/-/helper-regex-7.4.3.tgz",
+      "integrity": "sha512-hnoq5u96pLCfgjXuj8ZLX3QQ+6nAulS+zSgi6HulUwFbEruRAKwbGLU5OvXkE14L8XW6XsQEKsIDfgthKLRAyA==",
       "dev": true,
       "requires": {
-        "lodash": "^4.17.10"
+        "lodash": "^4.17.11"
       }
     },
     "@babel/helper-remap-async-to-generator": {
@@ -285,13 +285,13 @@
       }
     },
     "@babel/helpers": {
-      "version": "7.4.2",
-      "resolved": "https://registry.npmjs.org/@babel/helpers/-/helpers-7.4.2.tgz",
-      "integrity": "sha512-gQR1eQeroDzFBikhrCccm5Gs2xBjZ57DNjGbqTaHo911IpmSxflOQWMAHPw/TXk8L3isv7s9lYzUkexOeTQUYg==",
+      "version": "7.4.3",
+      "resolved": "https://registry.npmjs.org/@babel/helpers/-/helpers-7.4.3.tgz",
+      "integrity": "sha512-BMh7X0oZqb36CfyhvtbSmcWc3GXocfxv3yNsAEuM0l+fAqSO22rQrUpijr3oE/10jCTrB6/0b9kzmG4VetCj8Q==",
       "dev": true,
       "requires": {
         "@babel/template": "^7.4.0",
-        "@babel/traverse": "^7.4.0",
+        "@babel/traverse": "^7.4.3",
         "@babel/types": "^7.4.0"
       }
     },
@@ -307,9 +307,9 @@
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-      "version": "7.4.2",
-      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.4.2.tgz",
-      "integrity": "sha512-9fJTDipQFvlfSVdD/JBtkiY0br9BtfvW2R8wo6CX/Ej2eMuV0gWPk1M67Mt3eggQvBqYW1FCEk8BN7WvGm/g5g==",
+      "version": "7.4.3",
+      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.4.3.tgz",
+      "integrity": "sha512-gxpEUhTS1sGA63EGQGuA+WESPR/6tz6ng7tSHFCmaTJK/cGK8y37cBTspX+U2xCAue2IQVvF6Z0oigmjwD8YGQ==",
       "dev": true
     },
     "@babel/plugin-proposal-async-generator-functions": {
@@ -334,9 +334,9 @@
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+      "version": "7.4.3",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-proposal-object-rest-spread/-/plugin-proposal-object-rest-spread-7.4.3.tgz",
+      "integrity": "sha512-xC//6DNSSHVjq8O2ge0dyYlhshsH4T7XdCVoxbi5HzLYWfsC5ooFlJjrXk8RcAT+hjHAK9UjBXdylzSoDK3t4g==",
       "dev": true,
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@@ -440,9 +440,9 @@
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-      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-classes/-/plugin-transform-classes-7.4.0.tgz",
-      "integrity": "sha512-XGg1Mhbw4LDmrO9rSTNe+uI79tQPdGs0YASlxgweYRLZqo/EQktjaOV4tchL/UZbM0F+/94uOipmdNGoaGOEYg==",
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+      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-classes/-/plugin-transform-classes-7.4.3.tgz",
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@@ -465,23 +465,23 @@
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-      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-dotall-regex/-/plugin-transform-dotall-regex-7.2.0.tgz",
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+      "version": "7.4.3",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-dotall-regex/-/plugin-transform-dotall-regex-7.4.3.tgz",
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-        "@babel/helper-regex": "^7.0.0",
-        "regexpu-core": "^4.1.3"
+        "@babel/helper-regex": "^7.4.3",
+        "regexpu-core": "^4.5.4"
       }
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@@ -504,18 +504,18 @@
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-      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-for-of/-/plugin-transform-for-of-7.4.0.tgz",
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+      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-for-of/-/plugin-transform-for-of-7.4.3.tgz",
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-      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-function-name/-/plugin-transform-function-name-7.2.0.tgz",
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@@ -531,6 +531,15 @@
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       }
     },
+    "@babel/plugin-transform-member-expression-literals": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-member-expression-literals/-/plugin-transform-member-expression-literals-7.2.0.tgz",
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+      "dev": true,
+      "requires": {
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@@ -542,12 +551,12 @@
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+      "version": "7.4.3",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-modules-commonjs/-/plugin-transform-modules-commonjs-7.4.3.tgz",
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+        "@babel/helper-module-transforms": "^7.4.3",
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@@ -601,9 +610,9 @@
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@@ -611,15 +620,33 @@
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+      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-property-literals/-/plugin-transform-property-literals-7.2.0.tgz",
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+      "dev": true,
+      "requires": {
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+      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-regenerator/-/plugin-transform-regenerator-7.4.3.tgz",
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       "dev": true,
       "requires": {
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     },
+    "@babel/plugin-transform-reserved-words": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/@babel/plugin-transform-reserved-words/-/plugin-transform-reserved-words-7.2.0.tgz",
+      "integrity": "sha512-fz43fqW8E1tAB3DKF19/vxbpib1fuyCwSPE418ge5ZxILnBhWyhtPgz8eh1RCGGJlwvksHkyxMxh0eenFi+kFw==",
+      "dev": true,
+      "requires": {
+        "@babel/helper-plugin-utils": "^7.0.0"
+      }
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     "@babel/plugin-transform-shorthand-properties": {
       "version": "7.2.0",
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@@ -668,20 +695,20 @@
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-        "@babel/helper-regex": "^7.0.0",
-        "regexpu-core": "^4.1.3"
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-      "resolved": "https://registry.npmjs.org/@babel/polyfill/-/polyfill-7.4.0.tgz",
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@@ -695,16 +722,16 @@
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+      "resolved": "https://registry.npmjs.org/@babel/preset-env/-/preset-env-7.4.3.tgz",
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-        "@babel/plugin-proposal-object-rest-spread": "^7.4.0",
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@@ -715,36 +742,39 @@
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             "typedarray": "^0.0.6"
           }
+        },
+        "readable-stream": {
+          "version": "2.3.6",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+          "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
+          "dev": true,
+          "requires": {
+            "core-util-is": "~1.0.0",
+            "inherits": "~2.0.3",
+            "isarray": "~1.0.0",
+            "process-nextick-args": "~2.0.0",
+            "safe-buffer": "~5.1.1",
+            "string_decoder": "~1.1.1",
+            "util-deprecate": "~1.0.1"
+          }
         }
       }
     },
@@ -6306,6 +6554,21 @@
           "integrity": "sha1-oLhwcpquIUAFt9UDLsLLuw+0RRo=",
           "dev": true
         },
+        "readable-stream": {
+          "version": "2.3.6",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+          "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
+          "dev": true,
+          "requires": {
+            "core-util-is": "~1.0.0",
+            "inherits": "~2.0.3",
+            "isarray": "~1.0.0",
+            "process-nextick-args": "~2.0.0",
+            "safe-buffer": "~5.1.1",
+            "string_decoder": "~1.1.1",
+            "util-deprecate": "~1.0.1"
+          }
+        },
         "timers-browserify": {
           "version": "2.0.10",
           "resolved": "https://registry.npmjs.org/timers-browserify/-/timers-browserify-2.0.10.tgz",
@@ -6342,9 +6605,9 @@
       }
     },
     "node-releases": {
-      "version": "1.1.11",
-      "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-1.1.11.tgz",
-      "integrity": "sha512-8v1j5KfP+s5WOTa1spNUAOfreajQPN12JXbRR0oDE+YrJBQCXBnNqUDj27EKpPLOoSiU3tKi3xGPB+JaOdUEQQ==",
+      "version": "1.1.13",
+      "resolved": "https://registry.npmjs.org/node-releases/-/node-releases-1.1.13.tgz",
+      "integrity": "sha512-fKZGviSXR6YvVPyc011NHuJDSD8gFQvLPmc2d2V3BS4gr52ycyQ1Xzs7a8B+Ax3Ni/W+5h1h4SqmzeoA8WZRmA==",
       "dev": true,
       "requires": {
         "semver": "^5.3.0"
@@ -6371,6 +6634,20 @@
             "readable-stream": "^2.2.2",
             "typedarray": "^0.0.6"
           }
+        },
+        "readable-stream": {
+          "version": "2.3.6",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+          "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
+          "requires": {
+            "core-util-is": "~1.0.0",
+            "inherits": "~2.0.3",
+            "isarray": "~1.0.0",
+            "process-nextick-args": "~2.0.0",
+            "safe-buffer": "~5.1.1",
+            "string_decoder": "~1.1.1",
+            "util-deprecate": "~1.0.1"
+          }
         }
       }
     },
@@ -6659,6 +6936,23 @@
         "cyclist": "~0.2.2",
         "inherits": "^2.0.3",
         "readable-stream": "^2.1.5"
+      },
+      "dependencies": {
+        "readable-stream": {
+          "version": "2.3.6",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+          "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
+          "dev": true,
+          "requires": {
+            "core-util-is": "~1.0.0",
+            "inherits": "~2.0.3",
+            "isarray": "~1.0.0",
+            "process-nextick-args": "~2.0.0",
+            "safe-buffer": "~5.1.1",
+            "string_decoder": "~1.1.1",
+            "util-deprecate": "~1.0.1"
+          }
+        }
       }
     },
     "parent-module": {
@@ -6729,6 +7023,15 @@
       "integrity": "sha1-s2PlXoAGym/iF4TS2yK9FdeRfxQ=",
       "dev": true
     },
+    "path": {
+      "version": "0.12.7",
+      "resolved": "https://registry.npmjs.org/path/-/path-0.12.7.tgz",
+      "integrity": "sha1-1NwqUGxM4hl+tIHr/NWzbAFAsQ8=",
+      "requires": {
+        "process": "^0.11.1",
+        "util": "^0.10.3"
+      }
+    },
     "path-browserify": {
       "version": "0.0.1",
       "resolved": "https://registry.npmjs.org/path-browserify/-/path-browserify-0.0.1.tgz",
@@ -6852,8 +7155,7 @@
     "process": {
       "version": "0.11.10",
       "resolved": "https://registry.npmjs.org/process/-/process-0.11.10.tgz",
-      "integrity": "sha1-czIwDoQBYb2j5podHZGn1LwW8YI=",
-      "dev": true
+      "integrity": "sha1-czIwDoQBYb2j5podHZGn1LwW8YI="
     },
     "process-nextick-args": {
       "version": "2.0.0",
@@ -7024,6 +7326,23 @@
       "dev": true,
       "requires": {
         "readable-stream": "^2.0.2"
+      },
+      "dependencies": {
+        "readable-stream": {
+          "version": "2.3.6",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+          "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
+          "dev": true,
+          "requires": {
+            "core-util-is": "~1.0.0",
+            "inherits": "~2.0.3",
+            "isarray": "~1.0.0",
+            "process-nextick-args": "~2.0.0",
+            "safe-buffer": "~5.1.1",
+            "string_decoder": "~1.1.1",
+            "util-deprecate": "~1.0.1"
+          }
+        }
       }
     },
     "readable-blob-stream": {
@@ -7035,17 +7354,13 @@
       }
     },
     "readable-stream": {
-      "version": "2.3.6",
-      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
-      "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
+      "version": "3.3.0",
+      "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-3.3.0.tgz",
+      "integrity": "sha512-EsI+s3k3XsW+fU8fQACLN59ky34AZ14LoeVZpYwmZvldCFo0r0gnelwF2TcMjLor/BTL5aDJVBMkss0dthToPw==",
       "requires": {
-        "core-util-is": "~1.0.0",
-        "inherits": "~2.0.3",
-        "isarray": "~1.0.0",
-        "process-nextick-args": "~2.0.0",
-        "safe-buffer": "~5.1.1",
-        "string_decoder": "~1.1.1",
-        "util-deprecate": "~1.0.1"
+        "inherits": "^2.0.3",
+        "string_decoder": "^1.1.1",
+        "util-deprecate": "^1.0.1"
       }
     },
     "readdirp": {
@@ -7332,6 +7647,21 @@
             "snapdragon": "^0.8.1",
             "to-regex": "^3.0.2"
           }
+        },
+        "readable-stream": {
+          "version": "2.3.6",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+          "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
+          "dev": true,
+          "requires": {
+            "core-util-is": "~1.0.0",
+            "inherits": "~2.0.3",
+            "isarray": "~1.0.0",
+            "process-nextick-args": "~2.0.0",
+            "safe-buffer": "~5.1.1",
+            "string_decoder": "~1.1.1",
+            "util-deprecate": "~1.0.1"
+          }
         }
       }
     },
@@ -8195,6 +8525,23 @@
       "requires": {
         "inherits": "~2.0.1",
         "readable-stream": "^2.0.2"
+      },
+      "dependencies": {
+        "readable-stream": {
+          "version": "2.3.6",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+          "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
+          "dev": true,
+          "requires": {
+            "core-util-is": "~1.0.0",
+            "inherits": "~2.0.3",
+            "isarray": "~1.0.0",
+            "process-nextick-args": "~2.0.0",
+            "safe-buffer": "~5.1.1",
+            "string_decoder": "~1.1.1",
+            "util-deprecate": "~1.0.1"
+          }
+        }
       }
     },
     "stream-combiner2": {
@@ -8205,6 +8552,23 @@
       "requires": {
         "duplexer2": "~0.1.0",
         "readable-stream": "^2.0.2"
+      },
+      "dependencies": {
+        "readable-stream": {
+          "version": "2.3.6",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+          "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
+          "dev": true,
+          "requires": {
+            "core-util-is": "~1.0.0",
+            "inherits": "~2.0.3",
+            "isarray": "~1.0.0",
+            "process-nextick-args": "~2.0.0",
+            "safe-buffer": "~5.1.1",
+            "string_decoder": "~1.1.1",
+            "util-deprecate": "~1.0.1"
+          }
+        }
       }
     },
     "stream-each": {
@@ -8228,6 +8592,23 @@
         "readable-stream": "^2.3.6",
         "to-arraybuffer": "^1.0.0",
         "xtend": "^4.0.0"
+      },
+      "dependencies": {
+        "readable-stream": {
+          "version": "2.3.6",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+          "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
+          "dev": true,
+          "requires": {
+            "core-util-is": "~1.0.0",
+            "inherits": "~2.0.3",
+            "isarray": "~1.0.0",
+            "process-nextick-args": "~2.0.0",
+            "safe-buffer": "~5.1.1",
+            "string_decoder": "~1.1.1",
+            "util-deprecate": "~1.0.1"
+          }
+        }
       }
     },
     "stream-shift": {
@@ -8244,6 +8625,23 @@
       "requires": {
         "inherits": "^2.0.1",
         "readable-stream": "^2.0.2"
+      },
+      "dependencies": {
+        "readable-stream": {
+          "version": "2.3.6",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+          "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
+          "dev": true,
+          "requires": {
+            "core-util-is": "~1.0.0",
+            "inherits": "~2.0.3",
+            "isarray": "~1.0.0",
+            "process-nextick-args": "~2.0.0",
+            "safe-buffer": "~5.1.1",
+            "string_decoder": "~1.1.1",
+            "util-deprecate": "~1.0.1"
+          }
+        }
       }
     },
     "streamroller": {
@@ -8481,6 +8879,23 @@
       "requires": {
         "readable-stream": "~2.3.6",
         "xtend": "~4.0.1"
+      },
+      "dependencies": {
+        "readable-stream": {
+          "version": "2.3.6",
+          "resolved": "https://registry.npmjs.org/readable-stream/-/readable-stream-2.3.6.tgz",
+          "integrity": "sha512-tQtKA9WIAhBF3+VLAseyMqZeBjW0AHJoxOtYqSUZNJxauErmLbVm2FW1y+J/YA9dUrAC39ITejlZWhVIwawkKw==",
+          "dev": true,
+          "requires": {
+            "core-util-is": "~1.0.0",
+            "inherits": "~2.0.3",
+            "isarray": "~1.0.0",
+            "process-nextick-args": "~2.0.0",
+            "safe-buffer": "~5.1.1",
+            "string_decoder": "~1.1.1",
+            "util-deprecate": "~1.0.1"
+          }
+        }
       }
     },
     "timers-browserify": {
@@ -8919,7 +9334,6 @@
       "version": "0.10.4",
       "resolved": "https://registry.npmjs.org/util/-/util-0.10.4.tgz",
       "integrity": "sha512-0Pm9hTQ3se5ll1XihRic3FDIku70C+iHUdT/W926rSgHV5QgXsYbKZN8MSC3tJtSkhuROzvsQjAaFENRXr+19A==",
-      "dev": true,
       "requires": {
         "inherits": "2.0.3"
       }
diff --git a/package.json b/package.json
index 276bcc9c..e2635da8 100644
--- a/package.json
+++ b/package.json
@@ -34,9 +34,9 @@
     }
   ],
   "devDependencies": {
-    "@babel/cli": "^7.2.3",
-    "@babel/core": "^7.4.0",
-    "@babel/preset-env": "^7.4.2",
+    "@babel/cli": "^7.4.3",
+    "@babel/core": "^7.4.3",
+    "@babel/preset-env": "^7.4.3",
     "babel-loader": "^8.0.5",
     "babelify": "^10.0.0",
     "browserify": "^16.2.3",
@@ -68,18 +68,20 @@
     "webpack-cli": "^3.3.0"
   },
   "dependencies": {
-    "@babel/polyfill": "^7.4.0",
+    "@babel/polyfill": "^7.4.3",
     "buffer-from": "^1.1.1",
     "clone": "^2.1.2",
     "core-js": "^3.0.0",
     "defaults": "^1.0.3",
     "get-user-media-promise": "^1.1.4",
     "lodash.pullallwith": "^4.7.0",
-    "microphone-stream": "^4.1.3",
+    "microphone-stream": "^5.0.1",
     "nodeify-fetch": "^1.0.1",
     "object.assign": "^4.1.0",
     "object.pick": "^1.3.0",
+    "path": "^0.12.7",
     "readable-blob-stream": "^1.1.0",
+    "readable-stream": "^3.3.0",
     "watson-developer-cloud": "^3.18.3",
     "websocket": "^1.0.28",
     "whatwg-fetch": "^2.0.4"
diff --git a/speech-to-text/format-stream.js b/speech-to-text/format-stream.js
index 64afd859..3d080c93 100644
--- a/speech-to-text/format-stream.js
+++ b/speech-to-text/format-stream.js
@@ -1,6 +1,6 @@
 'use strict';
 
-var Transform = require('stream').Transform;
+var { Transform } = require('readable-stream');
 var util = require('util');
 var clone = require('clone');
 var defaults = require('defaults');
diff --git a/speech-to-text/recognize-microphone.js b/speech-to-text/recognize-microphone.js
index 1059cde0..e6ae1354 100644
--- a/speech-to-text/recognize-microphone.js
+++ b/speech-to-text/recognize-microphone.js
@@ -22,7 +22,7 @@ var L16 = require('./webaudio-l16-stream.js');
 var FormatStream = require('./format-stream.js');
 var assign = require('object.assign/polyfill')();
 var WritableElementStream = require('./writable-element-stream');
-var Writable = require('stream').Writable;
+var { Writable } = require('readable-stream');
 var ResultStream = require('./result-stream');
 var SpeakerStream = require('./speaker-stream');
 
diff --git a/speech-to-text/recognize-stream.js b/speech-to-text/recognize-stream.js
index 16f76fa1..9632fd67 100644
--- a/speech-to-text/recognize-stream.js
+++ b/speech-to-text/recognize-stream.js
@@ -16,7 +16,7 @@
 
 'use strict';
 
-var Duplex = require('stream').Duplex;
+var { Duplex } = require('readable-stream');
 var util = require('util');
 var pick = require('object.pick');
 var W3CWebSocket = require('websocket').w3cwebsocket;
diff --git a/speech-to-text/result-stream.js b/speech-to-text/result-stream.js
index 381d7144..ef054ea3 100644
--- a/speech-to-text/result-stream.js
+++ b/speech-to-text/result-stream.js
@@ -16,7 +16,7 @@
 
 'use strict';
 
-var Transform = require('stream').Transform;
+var { Transform } = require('readable-stream');
 var util = require('util');
 var clone = require('clone');
 
diff --git a/speech-to-text/speaker-stream.js b/speech-to-text/speaker-stream.js
index 85ba6423..ef27856f 100644
--- a/speech-to-text/speaker-stream.js
+++ b/speech-to-text/speaker-stream.js
@@ -16,7 +16,7 @@
 
 'use strict';
 
-var Transform = require('stream').Transform;
+var { Transform } = require('readable-stream');
 var util = require('util');
 var pullAllWith = require('lodash.pullallwith');
 var noTimestamps = require('./no-timestamps');
diff --git a/speech-to-text/timing-stream.js b/speech-to-text/timing-stream.js
index 355d8164..8e9382b1 100644
--- a/speech-to-text/timing-stream.js
+++ b/speech-to-text/timing-stream.js
@@ -1,6 +1,6 @@
 'use strict';
 
-var Transform = require('stream').Transform;
+var { Transform } = require('readable-stream');
 var util = require('util');
 var defaults = require('defaults');
 var noTimestamps = require('./no-timestamps');
diff --git a/speech-to-text/webaudio-l16-stream.js b/speech-to-text/webaudio-l16-stream.js
index d283d190..eebebaa1 100644
--- a/speech-to-text/webaudio-l16-stream.js
+++ b/speech-to-text/webaudio-l16-stream.js
@@ -1,5 +1,6 @@
 'use strict';
-var Transform = require('stream').Transform;
+
+var { Transform } = require('readable-stream');
 var util = require('util');
 var defaults = require('defaults');
 // some versions of the buffer browser lib don't support Buffer.from (such as the one included by the current version of express-browserify)
diff --git a/speech-to-text/writable-element-stream.js b/speech-to-text/writable-element-stream.js
index a8660c2f..ff47f411 100644
--- a/speech-to-text/writable-element-stream.js
+++ b/speech-to-text/writable-element-stream.js
@@ -1,6 +1,6 @@
 'use strict';
 
-var Writable = require('stream').Writable;
+var { Writable } = require('readable-stream');
 var util = require('util');
 var defaults = require('defaults');