diff --git a/CHANGELOG b/CHANGELOG
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,4 +1,8 @@
 2024-01-07
+        * Version bump (3.18.1). (#493)
+        * Update README to reflect support for GHC 9.6. (#491)
+
+2024-01-07
         * Version bump (3.18). (#487)
         * Enable tests for copilot-theorem in CI script. (#474)
         * Enable tests for copilot-libraries in CI script. (#475)
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -81,7 +81,7 @@
 On other Linux distributions or older Debian-based distributions, to use
 Copilot you must install a Haskell compiler (GHC) and the package manager
 Cabal. We currently support all versions of GHC from 8.6.5 to modern versions
-(9.4 as of this writing). You can install the toolchain using
+(9.6 as of this writing). You can install the toolchain using
 [ghcup](https://www.haskell.org/ghcup/) or, if you are on Debian/Ubuntu,
 directly with `apt-get`:
 
@@ -111,7 +111,7 @@
 
 To use Copilot you must have a Haskell compiler (GHC) and the package manager
 Cabal. We currently support all versions of GHC from 8.6.5 to modern versions
-(9.4 as of this writing). You can install the toolchain using
+(9.6 as of this writing). You can install the toolchain using
 [ghcup](https://www.haskell.org/ghcup/), as well as with Homebrew:
 
 ```sh
diff --git a/copilot.cabal b/copilot.cabal
--- a/copilot.cabal
+++ b/copilot.cabal
@@ -1,5 +1,5 @@
 name:                copilot
-version:             3.18
+version:             3.18.1
 cabal-version:       >= 1.10
 license:             BSD3
 license-file:        LICENSE
@@ -52,12 +52,12 @@
                      , directory             >= 1.3  && < 1.4
                      , filepath              >= 1.4  && < 1.5
 
-                     , copilot-core          >= 3.18 && < 3.19
-                     , copilot-theorem       >= 3.18 && < 3.19
-                     , copilot-language      >= 3.18 && < 3.19
-                     , copilot-libraries     >= 3.18 && < 3.19
-                     , copilot-c99           >= 3.18 && < 3.19
-                     , copilot-prettyprinter >= 3.18 && < 3.19
+                     , copilot-core          >= 3.18.1 && < 3.19
+                     , copilot-theorem       >= 3.18.1 && < 3.19
+                     , copilot-language      >= 3.18.1 && < 3.19
+                     , copilot-libraries     >= 3.18.1 && < 3.19
+                     , copilot-c99           >= 3.18.1 && < 3.19
+                     , copilot-prettyprinter >= 3.18.1 && < 3.19
 
 
     exposed-modules: Language.Copilot, Language.Copilot.Main