diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+# 0.0.2.1
+
+- Added support for GHC 9.12.
+
 # 0.0.2.0
 
 - Added the `fromSet` function to `MonoidMap`.
diff --git a/monoidmap.cabal b/monoidmap.cabal
--- a/monoidmap.cabal
+++ b/monoidmap.cabal
@@ -1,6 +1,6 @@
 cabal-version:  3.0
 name:           monoidmap
-version:        0.0.2.0
+version:        0.0.2.1
 bug-reports:    https://github.com/jonathanknowles/monoidmap/issues
 license:        Apache-2.0
 license-file:   LICENSE
@@ -17,7 +17,7 @@
     README.md
 
 common dependency-base
-    build-depends:base                          >= 4.14.3.0   && < 4.21
+    build-depends:base                          >= 4.14.3.0   && < 4.22
 common dependency-containers
     build-depends:containers                    >= 0.6.5.1    && < 0.8
 common dependency-deepseq