diff --git a/CHANGELOG.md b/CHANGELOG.md
index ab2f067..6690e26 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 ## master / unreleased
 
+## 0.15.1 / 2024-05-15
+
+* [BUGFIX] Fix histogram merge #324
+
 ## 0.15.0 / 2024-03-07
 
 * [FEATURE] Add projects query #243
diff --git a/VERSION b/VERSION
index a551051..e815b86 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.15.0
+0.15.1