diff --git a/ARTS_VERSION b/ARTS_VERSION
index 2714f5313ae11cebf3c524b8b58ca47df56e5deb..338a5b5d8fec491b97978114dc35e36348fa56a7 100644
--- a/ARTS_VERSION
+++ b/ARTS_VERSION
@@ -1 +1 @@
-2.6.4
+2.6.6
diff --git a/ChangeLog b/ChangeLog
index c44bb3f92aeeed289f50016f4c5e81c436ddd66d..61b416e79b6c2777fbfceaf696ec53224d902725 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2024-07-02 Oliver Lemke <oliver.lemke@uni-hamburg.de>
+
+	* ARTS-XML-DATA-2.6-6
+
+	* ARTS_VERSION: Bump version to 2.6.6
+
 2024-05-31 Oliver Lemke <oliver.lemke@uni-hamburg.de>
 
 	* ARTS-XML-DATA-2.6-5