diff --git a/package.json b/package.json
index 95e4515fc..5e00ea6a5 100644
--- a/package.json
+++ b/package.json
@@ -57,6 +57,7 @@
   "dependencies": {
     "accepts": "^1.3.3",
     "app-module-path": "^2.2.0",
+    "async": "^2.5.0",
     "bcrypt": "^1.0.2",
     "body-parser": "^1.17.1",
     "bowser": "^1.7.0",
diff --git a/plugins/talk-plugin-permalink/yarn.lock b/plugins/talk-plugin-permalink/yarn.lock
new file mode 100644
index 000000000..fb57ccd13
--- /dev/null
+++ b/plugins/talk-plugin-permalink/yarn.lock
@@ -0,0 +1,4 @@
+# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY.
+# yarn lockfile v1
+
+
diff --git a/yarn.lock b/yarn.lock
index 92edf11b5..f98887478 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -352,9 +352,9 @@ async@2.1.4:
   dependencies:
     lodash "^4.14.0"
 
-async@^2.0.1, async@^2.1.2, async@^2.1.4:
-  version "2.3.0"
-  resolved "https://registry.yarnpkg.com/async/-/async-2.3.0.tgz#1013d1051047dd320fe24e494d5c66ecaf6147d9"
+async@^2.0.1, async@^2.1.2, async@^2.1.4, async@^2.5.0:
+  version "2.5.0"
+  resolved "https://registry.yarnpkg.com/async/-/async-2.5.0.tgz#843190fd6b7357a0b9e1c956edddd5ec8462b54d"
   dependencies:
     lodash "^4.14.0"