diff --git a/History.markdown b/History.markdown
index f5ad6291..ef9e8f03 100644
--- a/History.markdown
+++ b/History.markdown
@@ -10,6 +10,7 @@
   * Add `-o` option to serve command which opens server URL (#4144)
   * Add CodeClimate platform for better code quality. (#4220)
   * General improvements for WEBrick via jekyll serve such as SSL & custom headers (#4224, #4228)
+  * Add a default charset to content-type on webrick. (#4231)
 
 ### Bug Fixes