diff --git a/pkgs/applications/science/logic/lean/default.nix b/pkgs/applications/science/logic/lean/default.nix
index 32a75cabc13..eae2e384df4 100644
--- a/pkgs/applications/science/logic/lean/default.nix
+++ b/pkgs/applications/science/logic/lean/default.nix
@@ -2,13 +2,13 @@
 
 stdenv.mkDerivation rec {
   pname = "lean";
-  version = "3.19.0";
+  version = "3.21.0";
 
   src = fetchFromGitHub {
     owner  = "leanprover-community";
     repo   = "lean";
     rev    = "v${version}";
-    sha256 = "1dybq6104vc62x620izgblfd8dqc4ynaiw8ml07km78lq38anm6v";
+    sha256 = "1c7f2x6hdamjkr50761gcb5mg8hhlc75k1mf18vn1k9zsy1gxlgz";
   };
 
   nativeBuildInputs = [ cmake ];