diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8ed9d4a88f..cb63960bd6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,15 @@
+# [4.0.0-alpha.1](https://github.com/contentful/ui-extensions-sdk/compare/v3.34.1...v4.0.0-alpha.1) (2021-05-10)
+
+
+### Features
+
+* improve space API typings  ([#684](https://github.com/contentful/ui-extensions-sdk/issues/684)) ([a57354c](https://github.com/contentful/ui-extensions-sdk/commit/a57354c32b78204d285aba897d213f201fec208c))
+
+
+### BREAKING CHANGES
+
+* old typings were too loose.
+
 ## [3.34.1](https://github.com/contentful/ui-extensions-sdk/compare/v3.34.0...v3.34.1) (2021-05-06)
 
 
diff --git a/package-lock.json b/package-lock.json
index 249bb59929..0534f8d8c7 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "contentful-ui-extensions-sdk",
-  "version": "3.34.1",
+  "version": "4.0.0-alpha.1",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/package.json b/package.json
index 56bb5c8438..28916e2f9d 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "contentful-ui-extensions-sdk",
   "description": "SDK to develop custom UI Extension for the Contentful Web App",
-  "version": "3.34.1",
+  "version": "4.0.0-alpha.1",
   "author": "Contentful GmbH",
   "license": "MIT",
   "repository": {