diff --git a/CHANGELOG.md b/CHANGELOG.md
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--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,9 @@
+## [3.1.1](https://github.com/mmistakes/minimal-mistakes/releases/tag/3.1.1)
+
+### Bug Fix
+
+- Fixed reading time bug when `words_per_minute` wasn't set in `_config.yml` [#271](https://github.com/mmistakes/minimal-mistakes/issues/271)
+
 ## [3.1.0](https://github.com/mmistakes/minimal-mistakes/releases/tag/3.1.0)
 
 ### Enhancements