diff --git a/History.md b/History.md
index 1c7eb9f..9371fbe 100644
--- a/History.md
+++ b/History.md
@@ -1,3 +1,8 @@
+# 2.3.1 / 2017-11-05
+
+  * Fix TIP version error: Sprintf format %s has arg of wrong type byte
+  * Travis: Test on Go 1.7, 1.8, 1.9, tip
+
 # 2.3.0 / 2017-11-05
 
   * Implement digest header generation
@@ -35,4 +40,4 @@
 1.0.0 / 2016-04-23
 ==================
 
-  * First versioned revision for use with gopkg.in
\ No newline at end of file
+  * First versioned revision for use with gopkg.in