diff --git a/bigcode-astgen/javascript/package.json b/bigcode-astgen/javascript/package.json
index 1c9214b..88e1476 100644
--- a/bigcode-astgen/javascript/package.json
+++ b/bigcode-astgen/javascript/package.json
@@ -8,7 +8,7 @@
   },
   "dependencies": {
     "acorn": "^5.1.2",
-    "async": "^2.5.0",
+    "async": "^3.2.2",
     "glob": "^7.1.2",
     "yargs": "10.0.3"
   },
diff --git a/bigcode-astgen/javascript/yarn.lock b/bigcode-astgen/javascript/yarn.lock
index 1fbbaee..b031df8 100644
--- a/bigcode-astgen/javascript/yarn.lock
+++ b/bigcode-astgen/javascript/yarn.lock
@@ -75,11 +75,9 @@ assertion-error@^1.0.1:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/assertion-error/-/assertion-error-1.0.2.tgz#13ca515d86206da0bac66e834dd397d87581094c"
 
-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"
+async@^3.2.2:
+  version "3.2.2"
+  resolved "https://registry.yarnpkg.com/async/-/async-3.2.2.tgz#2eb7671034bb2194d45d30e31e24ec7e7f9670cd"
 
 babel-code-frame@^6.22.0:
   version "6.26.0"
@@ -696,7 +694,7 @@ lodash.keys@^3.0.0:
     lodash.isarguments "^3.0.0"
     lodash.isarray "^3.0.0"
 
-lodash@^4.14.0, lodash@^4.17.4, lodash@^4.3.0:
+lodash@^4.17.4, lodash@^4.3.0:
   version "4.17.4"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.4.tgz#78203a4d1c328ae1d86dca6460e369b57f4055ae"