diff --git a/changelog.md b/changelog.md
index d85dce66..f2d8f945 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,3 +1,11 @@
+# 4.0.0
+
+Saves from 3.x are not compatible with 4.0.
+
+## Features/Improvements
+
+## Fixes
+
 # 3.0.0
 
 Saves from 2.5 are not compatible with 3.0.
diff --git a/game/version.py b/game/version.py
index 1a22c118..3da26c96 100644
--- a/game/version.py
+++ b/game/version.py
@@ -2,7 +2,7 @@ from pathlib import Path
 
 
 def _build_version_string() -> str:
-    components = ["3.0"]
+    components = ["4.0"]
     build_number_path = Path("resources/buildnumber")
     if build_number_path.exists():
         with build_number_path.open("r") as build_number_file: