diff --git a/pkgs/development/libraries/argparse/default.nix b/pkgs/development/libraries/argparse/default.nix
index ac195e909c67..a903ba9b711b 100644
--- a/pkgs/development/libraries/argparse/default.nix
+++ b/pkgs/development/libraries/argparse/default.nix
@@ -2,13 +2,13 @@
 
 stdenv.mkDerivation rec {
   pname = "argparse";
-  version = "2.6";
+  version = "2.9";
 
   src = fetchFromGitHub {
     owner = "p-ranav";
     repo = "argparse";
     rev = "v${version}";
-    sha256 = "sha256-imLDuVbzkiE5hcQVarZGeNzNZE0/8LHMQqAiUYzPVks=";
+    sha256 = "sha256-vbf4kePi5gfg9ub4aP1cCK1jtiA65bUS9+5Ghgvxt/E=";
   };
 
   nativeBuildInputs = [