diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8b80eabc8b..02109a8332 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 Gaps between patch versions are faulty/broken releases.
 
+## 2.4.7
+
+ * Upgrade `acorn-6to5`.
+
 ## 2.4.6
 
  * Move `coreAliasing` and `undefinedToVoid` transformers down to catch `moduleFormatter` transforms.
diff --git a/package.json b/package.json
index 6e591634d3..c6f30dd651 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
     "test": "make test"
   },
   "dependencies": {
-    "acorn-6to5": "0.11.1-3",
+    "acorn-6to5": "0.11.1-4",
     "ast-types": "~0.6.1",
     "chokidar": "0.11.1",
     "commander": "2.5.0",