diff --git a/pkgs/applications/science/logic/lean4/default.nix b/pkgs/applications/science/logic/lean4/default.nix
index 12465ad9087f..ecc929cb5f0e 100644
--- a/pkgs/applications/science/logic/lean4/default.nix
+++ b/pkgs/applications/science/logic/lean4/default.nix
@@ -9,13 +9,13 @@
 
 stdenv.mkDerivation rec {
   pname = "lean4";
-  version = "4.1.0";
+  version = "4.2.0";
 
   src = fetchFromGitHub {
     owner = "leanprover";
     repo = "lean4";
     rev = "v${version}";
-    hash = "sha256-6qbCafG0bL5KxQt2gL6hV4PFDsEMM0UXfldeOOqxsaE=";
+    hash = "sha256-56YtHCiNMP5fJoddSokEl0ws06IwetYLer4aLCnujZA=";
   };
 
   postPatch = ''