diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,10 @@
 tellbot CHANGELOG
 =================
 
+### 0.5.1.1
+
+- patch for old GHC versions (fixes uses of pure)
+
 ### 0.5.1
 
 - added an URL parser to detect what it contains
diff --git a/tellbot.cabal b/tellbot.cabal
--- a/tellbot.cabal
+++ b/tellbot.cabal
@@ -1,5 +1,5 @@
 name:                tellbot
-version:             0.5.1
+version:             0.5.1.1
 synopsis:            IRC tellbot
 description:         An IRC bot that can be used to create queuing message.
                      It also offers a simple administration IRC bot interface.