diff --git a/pkgs/by-name/el/elan/package.nix b/pkgs/by-name/el/elan/package.nix
index 11068cf6d36e..a73532dbe5b0 100644
--- a/pkgs/by-name/el/elan/package.nix
+++ b/pkgs/by-name/el/elan/package.nix
@@ -16,16 +16,16 @@
 
 rustPlatform.buildRustPackage (finalAttrs: {
   pname = "elan";
-  version = "4.2.0";
+  version = "4.2.1";
 
   src = fetchFromGitHub {
     owner = "leanprover";
     repo = "elan";
     rev = "v${finalAttrs.version}";
-    hash = "sha256-pbzZTdvjxIqzEDzE38rjeJ/lgHx8NRTD3osVP/A7nHo=";
+    hash = "sha256-NSgzAYQjsf3lwYOiuJbkLJGRZ7rY2FEOjPORXNhjWuU=";
   };
 
-  cargoHash = "sha256-fuXmI/IxxYooc8C5otH5BlCHv7SsfWevw4i9tW65rno=";
+  cargoHash = "sha256-JzyDVFp1lGPk1IK6CLQMBcJi5yCVD9x1iXtN0wlOF3g=";
 
   nativeBuildInputs = [
     pkg-config