diff --git a/History.markdown b/History.markdown
index 4594da46..6ff761a4 100644
--- a/History.markdown
+++ b/History.markdown
@@ -182,6 +182,7 @@
   * Updates html-proofer code (#5098)
   * Jekyll Community (#5097)
   * Typo in documentation file templates.md (#5117)
+  * Slightly, improve PNG compression. (#5112)
 
 ## 3.1.6 / 2016-05-19