diff --git a/CHANGELOG.org b/CHANGELOG.org
index fa868c661..931618a06 100644
--- a/CHANGELOG.org
+++ b/CHANGELOG.org
@@ -1,3 +1,8 @@
+* 0.5.1
+** Bug fix patch
+- =mgl-pax= updated on us causing build failures
+- Fix bug where the optimized Vampir output would produce incorrect
+  code
 * 0.5.0
 
 ** User Facing Changes
diff --git a/geb.asd b/geb.asd
index 1d990a4ff..18a3e45b2 100644
--- a/geb.asd
+++ b/geb.asd
@@ -5,7 +5,7 @@
                        :cl-reexport
                        :mgl-pax
                        :command-line-arguments)
-  :version "0.5.0"
+  :version "0.5.1"
   :description "Gödel, Escher, Bach, a categorical view of computation"
   :build-pathname "../build/geb.image"
   :entry-point "geb.entry::entry"