diff --git a/CHANGELOG.md b/CHANGELOG.md
index e4479048c681cba62a6e2891a0925feb587b370a..7e190313f02f94d31bb3a0e9f0310eed7b729ea4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,20 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed ###
 
+### Security ###
+
+## [0.5.1] - 2021-02-12 ##
+
+### Added ###
+
+### Changed ###
+
+### Deprecated ###
+
+### Removed ###
+
+### Fixed ###
+
 * #43 - Error with `execute_query` when server doesn't support query caching.
 
 ### Security ###
diff --git a/setup.py b/setup.py
index b488ee4ca834790df682658a1199f313b532252d..1a6cb7b52bea35107ed46142c5e5802f500afaac 100755
--- a/setup.py
+++ b/setup.py
@@ -49,7 +49,7 @@ MAJOR = 0
 MINOR = 5
 MICRO = 1
 PRE = ""  # e.g. rc0, alpha.1, 0.beta-23
-ISRELEASED = False
+ISRELEASED = True
 
 if PRE:
     VERSION = "{}.{}.{}-{}".format(MAJOR, MINOR, MICRO, PRE)