diff --git a/applying-css-classes-dynamically-ngClass/package-lock.json b/applying-css-classes-dynamically-ngClass/package-lock.json
index ea6c9e5a..5f89b8cc 100644
--- a/applying-css-classes-dynamically-ngClass/package-lock.json
+++ b/applying-css-classes-dynamically-ngClass/package-lock.json
@@ -12,7 +12,7 @@
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         "@angular/compiler": "^19.0.3",
         "@angular/forms": "^15.2.9",
-        "@angular/platform-browser": "^15.2.10",
+        "@angular/platform-browser": "^19.0.4",
         "@angular/platform-browser-dynamic": "^15.2.9",
         "@angular/router": "^19.0.3",
         "bootstrap": "^5.3.3",
@@ -800,9 +800,9 @@
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-      "version": "19.0.3",
-      "resolved": "https://registry.npmjs.org/@angular/animations/-/animations-19.0.3.tgz",
-      "integrity": "sha512-YWoXM2S5p+Eq6cX1xjtFaai23oVNnbf3u34pEQCyKDjZpqI5lMu8e63lQT0tf7fZttEWlNUYRTwQ9+MpZ0sjzQ==",
+      "version": "19.0.4",
+      "resolved": "https://registry.npmjs.org/@angular/animations/-/animations-19.0.4.tgz",
+      "integrity": "sha512-iGuOMlVhLBmGCSJ5azqwLdsBIFlWXtB+CffeoJjKXGjR2YRxP1aylNccB5UqE7G/XjNNLjJfLkm+nQUAWGLMNg==",
       "license": "MIT",
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@@ -811,7 +811,7 @@
         "node": "^18.19.1 || ^20.11.1 || >=22.0.0"
       },
       "peerDependencies": {
-        "@angular/core": "19.0.3"
+        "@angular/core": "19.0.4"
       }
     },
     "node_modules/@angular/cli": {
@@ -1048,18 +1048,18 @@
       "license": "ISC"
     },
     "node_modules/@angular/common": {
-      "version": "19.0.3",
-      "resolved": "https://registry.npmjs.org/@angular/common/-/common-19.0.3.tgz",
-      "integrity": "sha512-YyBVZU+LQ38R+/U5vF/b1T3muROKpR0kkupMw7VKnGhQfgrRX5Dk3H2nr9ritt0zPc7TOUuQSlHMf3QWah2GDg==",
+      "version": "15.2.10",
+      "resolved": "https://registry.npmjs.org/@angular/common/-/common-15.2.10.tgz",
+      "integrity": "sha512-jdBn3fctkqoNrJn9VLsUHpcCEhCxWSczdsR+BBbD6T0oLl6vMrAVNjPwfBejnlgfWN1KoRU9kgOYsMxa5apIWQ==",
       "license": "MIT",
       "dependencies": {
         "tslib": "^2.3.0"
       },
       "engines": {
-        "node": "^18.19.1 || ^20.11.1 || >=22.0.0"
+        "node": "^14.20.0 || ^16.13.0 || >=18.10.0"
       },
       "peerDependencies": {
-        "@angular/core": "19.0.3",
+        "@angular/core": "15.2.10",
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@@ -1159,27 +1159,27 @@
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-      "resolved": "https://registry.npmjs.org/@angular/forms/-/forms-19.0.3.tgz",
-      "integrity": "sha512-8wf8yDR6cW+lOhpzhmxUOiI5Wjr1Kf7o8NuJ2P5K6b7IMNRzRyR5q/6R4NUwtF6aaJ1wNqmSof+goQmtn1HOcw==",
+      "version": "15.2.10",
+      "resolved": "https://registry.npmjs.org/@angular/forms/-/forms-15.2.10.tgz",
+      "integrity": "sha512-NIntGsNcN6o8L1txsbWXOf6f3K/CUBizdKsxsYVYGJIXEW5qU6UnWmfAZffNNXsT/XvbgUCjgDwT0cAwcqZPuQ==",
       "license": "MIT",
       "dependencies": {
         "tslib": "^2.3.0"
       },
       "engines": {
-        "node": "^18.19.1 || ^20.11.1 || >=22.0.0"
+        "node": "^14.20.0 || ^16.13.0 || >=18.10.0"
       },
       "peerDependencies": {
-        "@angular/common": "19.0.3",
-        "@angular/core": "19.0.3",
-        "@angular/platform-browser": "19.0.3",
+        "@angular/common": "15.2.10",
+        "@angular/core": "15.2.10",
+        "@angular/platform-browser": "15.2.10",
         "rxjs": "^6.5.3 || ^7.4.0"
       }
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     "node_modules/@angular/platform-browser": {
-      "version": "19.0.3",
-      "resolved": "https://registry.npmjs.org/@angular/platform-browser/-/platform-browser-19.0.3.tgz",
-      "integrity": "sha512-vggWHSzOsCpYqnGq5IIN+n7xdEvXfgUGaMdgzPhFMTsnlMTUs5+VEFl9tX9FANHkXKB5S1RttVyvEXRqJM9ncQ==",
+      "version": "19.0.4",
+      "resolved": "https://registry.npmjs.org/@angular/platform-browser/-/platform-browser-19.0.4.tgz",
+      "integrity": "sha512-/PRr7kLVVqNFqAkw+SK8RwqE479qCcUyuw6GOHtGabt3ZfQKSbx+pTioVrZFEy5pTBMslCPV5q3I+wGRG7/nyg==",
       "license": "MIT",
       "dependencies": {
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@@ -1188,9 +1188,9 @@
         "node": "^18.19.1 || ^20.11.1 || >=22.0.0"
       },
       "peerDependencies": {
-        "@angular/animations": "19.0.3",
-        "@angular/common": "19.0.3",
-        "@angular/core": "19.0.3"
+        "@angular/animations": "19.0.4",
+        "@angular/common": "19.0.4",
+        "@angular/core": "19.0.4"
       },
       "peerDependenciesMeta": {
         "@angular/animations": {
@@ -1199,21 +1199,21 @@
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-      "resolved": "https://registry.npmjs.org/@angular/platform-browser-dynamic/-/platform-browser-dynamic-19.0.3.tgz",
-      "integrity": "sha512-gFh+QN7JvepnD3mS0XmOtDmfY8h5sSkk2/guesE2A68Na8q+M3fGZlz7I37tCXToLth5us1X0Gi0UPCSESc4SA==",
+      "version": "15.2.10",
+      "resolved": "https://registry.npmjs.org/@angular/platform-browser-dynamic/-/platform-browser-dynamic-15.2.10.tgz",
+      "integrity": "sha512-JHP6W+FX715Qv7DhqvfZLuBZXSDJrboiQsR06gUAgDSjAUyhbqmpVg/2YOtgeWpPkzNDtXdPU2PhcRdIv5J3Yg==",
       "license": "MIT",
       "dependencies": {
         "tslib": "^2.3.0"
       },
       "engines": {
-        "node": "^18.19.1 || ^20.11.1 || >=22.0.0"
+        "node": "^14.20.0 || ^16.13.0 || >=18.10.0"
       },
       "peerDependencies": {
-        "@angular/common": "19.0.3",
-        "@angular/compiler": "19.0.3",
-        "@angular/core": "19.0.3",
-        "@angular/platform-browser": "19.0.3"
+        "@angular/common": "15.2.10",
+        "@angular/compiler": "15.2.10",
+        "@angular/core": "15.2.10",
+        "@angular/platform-browser": "15.2.10"
       }
     },
     "node_modules/@angular/router": {
diff --git a/applying-css-classes-dynamically-ngClass/package.json b/applying-css-classes-dynamically-ngClass/package.json
index 153d86ad..9691b75d 100644
--- a/applying-css-classes-dynamically-ngClass/package.json
+++ b/applying-css-classes-dynamically-ngClass/package.json
@@ -14,7 +14,7 @@
     "@angular/common": "^15.2.9",
     "@angular/compiler": "^19.0.3",
     "@angular/forms": "^15.2.9",
-    "@angular/platform-browser": "^15.2.10",
+    "@angular/platform-browser": "^19.0.4",
     "@angular/platform-browser-dynamic": "^15.2.9",
     "@angular/router": "^19.0.3",
     "bootstrap": "^5.3.3",