diff --git a/CHANGES b/CHANGES
index 87ec8856..34796b48 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2,7 +2,7 @@
  CHANGELOG for GromacsWrapper
 ==============================
 
-2016-xx-xx      0.5.1
+2016-06-29      0.5.1
 whitead, dotsdl, orbeckst
 
 * fixed: check_mdrun_success() works now for Gromacs 4 and Gromacs 5
@@ -11,10 +11,10 @@ whitead, dotsdl, orbeckst
 * fixed setup.energy_minimize() not falling back to single precision
   mdrun (issue #63)
 * fixed: added missing alias "gmx solvate" <--> "genbox" (issue #62)
-* improved testing
 * added keyword argument use_shell=True to Command() to make Popen use
   the shell
 * added template for Gromacs 4.6.x gromacswrapper.cfg
+* improved testing
 
 
 2016-05-23      0.5.0
diff --git a/gromacs/version.py b/gromacs/version.py
index 79b33cc5..94195a82 100644
--- a/gromacs/version.py
+++ b/gromacs/version.py
@@ -8,7 +8,7 @@
 VERSION = 0,5,1
 #: Set to ``True`` for a release. If set to ``False`` then the patch level
 #: will have the suffix "-dev".
-RELEASE = False
+RELEASE = True
 if not RELEASE:
     VERSION = VERSION[:2] + (str(VERSION[2]) + '-dev',)