diff --git a/pkgs/development/tools/protoc-gen-connect-go/default.nix b/pkgs/development/tools/protoc-gen-connect-go/default.nix
index ac664c5b2aa7..123573401dae 100644
--- a/pkgs/development/tools/protoc-gen-connect-go/default.nix
+++ b/pkgs/development/tools/protoc-gen-connect-go/default.nix
@@ -5,16 +5,16 @@
 
 buildGoModule rec {
   pname = "protoc-gen-connect-go";
-  version = "1.8.0";
+  version = "1.9.0";
 
   src = fetchFromGitHub {
     owner = "bufbuild";
     repo = "connect-go";
     rev = "refs/tags/v${version}";
-    hash = "sha256-V6PXapfWo0WlRz1PP90ZcHI/s9MHXhU3p4i7K6eWC8g=";
+    hash = "sha256-2U5f+VUXZ8J9K27RccKvEY7FJs57XMasKMk+xgy0LuI=";
   };
 
-  vendorHash = "sha256-yCZ16rmqi8DAwIVuEgCw373bQX+cLhSNbpKutF5L2bc=";
+  vendorHash = "sha256-3opkr4kUD3NQNbNYOdSWIDqKbArv9OQUkBMzae1ccVY=";
 
   subPackages = [
     "cmd/protoc-gen-connect-go"