diff --git a/CHANGELOG.md b/CHANGELOG.md
index 950950f..f3c3df5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,4 @@
-## 3.1.1 [unreleased]
+## 3.1.1
 
 - Fixed `current: false`
 - Fixed `last` with `group_by_quarter`
diff --git a/lib/groupdate/version.rb b/lib/groupdate/version.rb
index 65790b0..4f3d0ef 100644
--- a/lib/groupdate/version.rb
+++ b/lib/groupdate/version.rb
@@ -1,3 +1,3 @@
 module Groupdate
-  VERSION = "3.1.0"
+  VERSION = "3.1.1"
 end
--
libgit2 0.21.0