diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Revision history for fs-sim
 
+## 0.5.0.1 -- 2026-05-18
+
+### Patch
+
+* Allow `QuickCheck 2.18.0.0`.
+
 ## 0.5.0.0 -- 2026-04-23
 
 ### Breaking
diff --git a/fs-sim.cabal b/fs-sim.cabal
--- a/fs-sim.cabal
+++ b/fs-sim.cabal
@@ -1,6 +1,6 @@
 cabal-version: 3.0
 name: fs-sim
-version: 0.5.0.0
+version: 0.5.0.1
 synopsis: Simulated file systems
 description: Simulated file systems.
 license: Apache-2.0
@@ -44,7 +44,7 @@
 
   default-language: Haskell2010
   build-depends:
-    QuickCheck ^>=2.13 || ^>=2.14 || ^>=2.15 || ^>=2.16 || ^>=2.17,
+    QuickCheck ^>=2.13 || ^>=2.14 || ^>=2.15 || ^>=2.16 || ^>=2.17 || ^>=2.18,
     base >=4.16 && <4.23,
     base16-bytestring ^>=0.1 || ^>=1.0,
     bytestring ^>=0.10 || ^>=0.11 || ^>=0.12,