diff --git a/modules/scrollback/package.json b/modules/scrollback/package.json
index f942948..bfdd070 100644
--- a/modules/scrollback/package.json
+++ b/modules/scrollback/package.json
@@ -3,7 +3,7 @@
   "version": "0.0.0",
   "description": "",
   "dependencies": {
-    "async": "^0.9.0",
+    "async": "^2.6.4",
     "parse-numeric-range": "0.0.1",
     "underscore": "^1.6.0"
   },
diff --git a/modules/scrollback/yarn.lock b/modules/scrollback/yarn.lock
index 77e70ac..4734fe0 100644
--- a/modules/scrollback/yarn.lock
+++ b/modules/scrollback/yarn.lock
@@ -2,9 +2,15 @@
 # yarn lockfile v1
 
 
-async@^0.9.0:
-  version "0.9.2"
-  resolved "https://registry.yarnpkg.com/async/-/async-0.9.2.tgz#aea74d5e61c1f899613bf64bda66d4c78f2fd17d"
+async@^2.6.4:
+  version "2.6.4"
+  resolved "https://registry.yarnpkg.com/async/-/async-2.6.4.tgz#706b7ff6084664cd7eae713f6f965433b5504221"
+  dependencies:
+    lodash "^4.17.14"
+
+lodash@^4.17.14:
+  version "4.17.21"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.21.tgz#679591c564c3bffaae8454cf0b3df370c3d6911c"
 
 parse-numeric-range@0.0.1:
   version "0.0.1"