diff --git a/Changelog.md b/Changelog.md
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,5 +1,10 @@
 # Monoidal containers
 
+# 0.6.6.0
+
+* [Support ghc 9.12](https://github.com/bgamari/monoidal-containers/pull/108)
+* [Allow hashable 1.5](https://github.com/bgamari/monoidal-containers/pull/107]
+
 # 0.6.5.0
 
 * [Support for GHC 9.10](https://github.com/bgamari/monoidal-containers/pull/105)
diff --git a/monoidal-containers.cabal b/monoidal-containers.cabal
--- a/monoidal-containers.cabal
+++ b/monoidal-containers.cabal
@@ -1,5 +1,5 @@
 name:               monoidal-containers
-version:            0.6.5.0
+version:            0.6.6.0
 synopsis:           Containers with monoidal accumulation
 description:
   Containers with merging via monoidal accumulation. The 'Monoid' instances
@@ -27,11 +27,11 @@
 extra-source-files: Changelog.md
 tested-with:
   GHC ==8.2 || ==8.4 || ==8.6 || ==8.8 || ==8.10 || ==9.0 || ==9.2 || ==9.4
-   || ==9.6 || ==9.10
+   || ==9.6 || ==9.10 || ==9.12
 
 source-repository head
   type:     git
-  location: git://github.com/bgamari/monoidal-containers
+  location: https://github.com/bgamari/monoidal-containers
 
 flag split-these
   description: Use split these/semialign packages
@@ -55,10 +55,10 @@
 
   build-depends:
       aeson                 >=1.0   && <2.3
-    , base                  >=4.7   && <4.21
+    , base                  >=4.7   && <4.22
     , containers            >=0.5.9 && <0.8
     , deepseq               >=1.3   && <1.6
-    , hashable              >=1.2   && <1.5
+    , hashable              >=1.2   && <1.6
     , lens                  >=4.4   && <5.4
     , newtype               >=0.2   && <0.3
     , unordered-containers  >=0.2   && <0.3