diff --git a/CHANGELOG.md b/CHANGELOG.md
index 88b5938de3c88d1e4a31ad6981e5224a035034ce..fcb5a205612bdbb66b025e88be657402d6acc1fc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,20 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added ###
 
+### Changed ###
+
+### Deprecated ###
+
+### Removed ###
+
+### Fixed ###
+
+### Security ###
+
+## [0.5.0] - 2021-02-11 ##
+
+### Added ###
+
 * New exceptions `HTTPForbiddenException` and
   `HTTPResourceNotFoundException` for HTTP 403 and 404 errors,
   respectively.
diff --git a/setup.py b/setup.py
index 9c638fbc88eed39f263d4d90652685ba4db984af..3d6fa961b6b41638a47f4fb60e61add39e7680e1 100755
--- a/setup.py
+++ b/setup.py
@@ -49,7 +49,7 @@ MAJOR = 0
 MINOR = 5
 MICRO = 0
 PRE = ""  # e.g. rc0, alpha.1, 0.beta-23
-ISRELEASED = False
+ISRELEASED = True
 
 if PRE:
     VERSION = "{}.{}.{}-{}".format(MAJOR, MINOR, MICRO, PRE)