diff --git a/CHANGES.rst b/CHANGES.rst
index 99e62737..3de51c0f 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -19,8 +19,8 @@ Release history
    - Removed
    - Fixed
 
-0.3.1 (unreleased)
-==================
+0.3.1 (November 16, 2020)
+=========================
 
 **Changed**
 
diff --git a/keras_lmu/version.py b/keras_lmu/version.py
index 1c503cb9..d7287c0c 100644
--- a/keras_lmu/version.py
+++ b/keras_lmu/version.py
@@ -8,7 +8,7 @@
 
 name = "keras_lmu"
 version_info = (0, 3, 1)  # (major, minor, patch)
-dev = 0
+dev = None  # set to None for releases
 
 version = (
     f"{'.'.join(str(v) for v in version_info)}{f'.dev{dev}' if dev is not None else ''}"