diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1137459..09fa721 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 4.0.0 (2020-08-13)
+
+* Require acorn ^7.4 or ^8
+
 ## 3.1.0 (2020-08-13)
 
 * Mark as supporting acorn@8
diff --git a/package.json b/package.json
index e94c2ff..a00b2c2 100644
--- a/package.json
+++ b/package.json
@@ -26,7 +26,7 @@
     "acorn-private-methods": "^0.3.3",
     "acorn-static-class-features": "^0.2.4"
   },
-  "version": "3.1.0",
+  "version": "4.0.0",
   "devDependencies": {
     "acorn": "^8",
     "eslint": "^7",