diff --git a/CHANGELOG.md b/CHANGELOG.md
index dcdbedbe..69e0c98d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 <!--next-version-placeholder-->
 
+## v2.5.1 (2024-11-26)
+
+### Fix
+
+* Add unique_count agg to v1 ([`8dcde63`](https://github.com/Aarhus-Psychiatry-Research/timeseriesflattener/commit/8dcde63ec2ed6285b7324e2863f861e81a6170ec))
+
 ## v2.5.0 (2024-11-25)
 
 ### Feature
diff --git a/pyproject.toml b/pyproject.toml
index d15fcfe2..ddb1eaef 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "timeseriesflattener"
-version = "2.5.0"
+version = "2.5.1"
 authors = [
   { name = "Lasse Hansen", email = "lasseh0310@gmail.com" },
   { name = "Jakob Grøhn Damgaard", email = "bokajgd@gmail.com" },