diff --git a/pkgs/development/tools/misc/complgen/default.nix b/pkgs/development/tools/misc/complgen/default.nix
index ad83f8f2078a..c9685d53511e 100644
--- a/pkgs/development/tools/misc/complgen/default.nix
+++ b/pkgs/development/tools/misc/complgen/default.nix
@@ -5,16 +5,16 @@
 
 rustPlatform.buildRustPackage {
   pname = "complgen";
-  version = "unstable-2023-08-17";
+  version = "unstable-2023-08-22";
 
   src = fetchFromGitHub {
     owner = "adaszko";
     repo = "complgen";
-    rev = "4f01c04184b31804009e0002ff6ba1c777439798";
-    hash = "sha256-KQFMWVHTlkf65ghgv3oR2Jz4QtXkdz6CNIC3eeyBgBg=";
+    rev = "8c9b9c51f3465c6d858e15f442b63e94b2f5ed1b";
+    hash = "sha256-oYRaH3FbAFY7QujgFpUDD8gVam4+Gm9qROxCTMYBg9I=";
   };
 
-  cargoHash = "sha256-m/eFpwMZOOVGVeXjQwNZheuPeGkJd0mAF903ML/Kr90=";
+  cargoHash = "sha256-LHnIIkQLuY+A09qhxSiyLmUpX/dES7xBE5m1uRPI0i0=";
 
   meta = with lib; {
     description = "Generate {bash,fish,zsh} completions from a single EBNF-like grammar";