diff --git a/lerna.json b/lerna.json
index 7485c9502..554e722cf 100644
--- a/lerna.json
+++ b/lerna.json
@@ -1,6 +1,6 @@
 {
     "npmClient": "yarn",
     "useWorkspaces": true,
-    "version": "4.0.2",
+    "version": "4.0.3",
     "hoist": true
 }
diff --git a/packages/mobx-state-tree/package.json b/packages/mobx-state-tree/package.json
index 2b445d1aa..748de1255 100644
--- a/packages/mobx-state-tree/package.json
+++ b/packages/mobx-state-tree/package.json
@@ -1,6 +1,6 @@
 {
     "name": "mobx-state-tree",
-    "version": "4.0.2",
+    "version": "4.0.3",
     "description": "Opinionated, transactional, MobX powered state container",
     "main": "dist/mobx-state-tree.js",
     "umd:main": "dist/mobx-state-tree.umd.js",
diff --git a/packages/mst-middlewares/package.json b/packages/mst-middlewares/package.json
index ac751a96e..34a3fa124 100644
--- a/packages/mst-middlewares/package.json
+++ b/packages/mst-middlewares/package.json
@@ -1,6 +1,6 @@
 {
     "name": "mst-middlewares",
-    "version": "4.0.2",
+    "version": "4.0.3",
     "description": "The MST package ships with some prebuilt middlewares, which serves mainly as examples on how to write your own middleware. The source of each middleware can be found in this github directory, you are encouraged to read them!",
     "main": "dist/mst-middlewares.js",
     "umd:main": "dist/mst-middlewares.umd.js",
@@ -37,7 +37,7 @@
         "jest": "^26.1.0",
         "jest-junit": "^11.0.1",
         "mobx": "^6.0.4",
-        "mobx-state-tree": "^4.0.2",
+        "mobx-state-tree": "^4.0.3",
         "rollup": "^2.18.1",
         "rollup-plugin-commonjs": "^10.0.0",
         "rollup-plugin-filesize": "^9.0.1",