diff --git a/CHANGES.txt b/CHANGES.txt
index ab80c130f584e9973c44f9f121070a531b600fba..698ff2cea1258298a35bc5bb7629972450ac898f 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -6,6 +6,9 @@ Make Experiments!
 Release Changes
 ---------------
 
+Release 1.2.1
+=============
+
 Release 1.2.0
 =============
 
diff --git a/doc/mkexp.fodt b/doc/mkexp.fodt
index 9c4a0fa6c963094eaff6ffeb48b34ac73de0a010..d2b4faa92d0414cecce79de1fda96f37d140b21d 100644
--- a/doc/mkexp.fodt
+++ b/doc/mkexp.fodt
@@ -3112,7 +3112,7 @@
    </text:sequence-decls>
    <text:p text:style-name="P396">Make Experiments!</text:p>
    <text:p text:style-name="P5">Run-script generation for earth system models</text:p>
-   <text:p text:style-name="P321">Release 1.2.0</text:p>
+   <text:p text:style-name="P321">Release 1.2.1dev</text:p>
    <text:p text:style-name="P375">Karl-Hermann Wieners<text:line-break/><text:span text:style-name="T312">Max-Planck-Institut für Meteorologie<text:line-break/>Hamburg</text:span></text:p>
    <text:table-of-content text:style-name="Sect1" text:protected="true" text:name="Table of Contents1">
     <text:table-of-content-source text:outline-level="10">
diff --git a/doc/mkexp.pdf b/doc/mkexp.pdf
index a14f566a1f7651811e17fcb8fb11ece75fb48d60..f95bdfbb82391eeae32625d55089baefc4b232a6 100644
Binary files a/doc/mkexp.pdf and b/doc/mkexp.pdf differ
diff --git a/package_info.py b/package_info.py
index eaa7289be70bd0de1637ec2f062f25ecae1d76da..5ad00a5a7c70a7eaa63ab40b6b346e886bef7d13 100644
--- a/package_info.py
+++ b/package_info.py
@@ -4,4 +4,4 @@ Information on package name and version
 
 full_name = 'Make Experiments!'
 name = 'mkexp'
-version = '1.2.0'
+version = '1.2.1dev'