diff --git a/CHANGELOG.md b/CHANGELOG.md
index 16df98b..1fbf7a0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,7 @@
 
 # History
 
-## 3.4.0
+## 4.0.0
 - Library:
   - Migrated REST API support from v0.6 to v0.7.
   - Removed the `UploadcareClient.storeGroup()` and `UploadcareGroup.store()` methods, as their
diff --git a/gradle.properties b/gradle.properties
index 5b0c46c..95e2022 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,5 +1,5 @@
 # Project-wide Gradle settings.
-version=3.4.0-SNAPSHOT
+version=4.0.0-SNAPSHOT
 
 # IDE (e.g. Android Studio) users:
 # Gradle settings configured through the IDE *will override*