diff --git a/pkgs/development/nim-packages/npeg/default.nix b/pkgs/development/nim-packages/npeg/default.nix
index 552449b7102a..51c7383bff3e 100644
--- a/pkgs/development/nim-packages/npeg/default.nix
+++ b/pkgs/development/nim-packages/npeg/default.nix
@@ -2,12 +2,12 @@
 
 buildNimPackage rec {
   pname = "npeg";
-  version = "1.0.1";
+  version = "1.2.1";
   src = fetchFromGitHub {
     owner = "zevv";
     repo = pname;
     rev = version;
-    hash = "sha256-EN3wTSa+WveO7V29A2lJgWLwIlHzQE8t7T2m4u7niMc=";
+    hash = "sha256-kN91cp50ZL4INeRWqwrRK6CAkVXUq4rN4YlcN6WL/3Y=";
   };
   doCheck = true;
   meta = src.meta // {