diff --git a/pkgs/applications/blockchains/polkadot/default.nix b/pkgs/applications/blockchains/polkadot/default.nix
index a1f0b17b2020..b2fc34ca5723 100644
--- a/pkgs/applications/blockchains/polkadot/default.nix
+++ b/pkgs/applications/blockchains/polkadot/default.nix
@@ -7,16 +7,16 @@
 }:
 rustPlatform.buildRustPackage rec {
   pname = "polkadot";
-  version = "0.9.8";
+  version = "0.9.9";
 
   src = fetchFromGitHub {
     owner = "paritytech";
     repo = "polkadot";
     rev = "v${version}";
-    sha256 = "sha256-5PNogoahAZUjIlQsVXwm7j5OmP3/uEEdV0vrIDXXBx8=";
+    sha256 = "sha256-GsGa2y718qWQlP0pLy8X3mVsFpNNnOTVQZpp4+e1RhA=";
   };
 
-  cargoSha256 = "0iikys90flzmnnb6l2wzag8mp91p6z9y7rjzym2sd6m7xhgbc1x6";
+  cargoSha256 = "03lnw61pgp88iwz2gbcp8y3jvz6v94cn0ynjz6snb9jq88gf25dz";
 
   nativeBuildInputs = [ clang ];