diff --git a/ChangeLog b/ChangeLog
index 093a8abe46e093501102c655d40c696409a862ef..b1e9272c0692a43be5c759aa014b62854d57147e 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,4 +1,4 @@
-2025-02-28  Uwe Schulzweida
+2025-03-05  Uwe Schulzweida
 
 	* Version 2.5.1 released
 
diff --git a/NEWS b/NEWS
index d21b4942d545009488a8b484d6f3d109096da300..d05d2f19a2af320a4b8a230800d10148067b0809 100644
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,12 @@
 CDI NEWS
 --------
 
+Version 2.5.1 (05 Mar 2025):
+
+   Changes:
+     * NetCDF4: improved calculation of output chunk size
+     * NetCDF4: improved calculation of input chunk cache size for numStep>1 and zSize>1
+
 Version 2.5.0 (28 Nov 2024):
 
    Changes: