diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4ee79cc..4df449d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 - Nothing
 
+## [1.1.1] - 2020-06-09
+
+### Added
+
+- Entry `Mach` in `names.bib` (d0d5683). Was previously removed, but is required.
+
 ## [1.1.0] - 2020-06-09
 
 ### Added
diff --git a/cookbook.cls b/cookbook.cls
index c6a58d6..6b8db5a 100644
--- a/cookbook.cls
+++ b/cookbook.cls
@@ -11,7 +11,7 @@
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 % Refer to https://www.overleaf.com/learn/latex/Writing_your_own_class
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesClass{cookbook}[2020/06/09 v1.1.0 cookbook class]
+\ProvidesClass{cookbook}[2020/06/09 v1.1.1 cookbook class]
 
 \newcommand*{\@baseclass}{scrbook}% Name of class this one is based on