diff --git a/ChangeLog b/ChangeLog
index e36c0a0f8fcafd8c1aece82ace37005ece87dd8d..df46739e4e7973131c08dba22b620d9a551f1639 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2025-02-28  Uwe Schulzweida
+
+	* Version 2.5.1 released
+
 2024-12-28  Uwe Schulzweida
 
 	* NetCDF4: improved calculation of output chunk size
diff --git a/configure.ac b/configure.ac
index caa057f45a4237c314588e343f073fcbedc14504..8855b67b2cd093876f78c5589a76f6d88889e17d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -7,7 +7,7 @@
 AC_PREREQ([2.69])
 LT_PREREQ([2.4.6])
 
-AC_INIT([cdi],[2.5.0],[https://mpimet.mpg.de/cdi])
+AC_INIT([cdi],[2.5.1],[https://mpimet.mpg.de/cdi])
 AC_DEFINE_UNQUOTED(CDI, ["$PACKAGE_VERSION"], [CDI version])
 
 AC_CONFIG_AUX_DIR([config])