diff --git a/pkgs/development/python-modules/google-cloud-texttospeech/default.nix b/pkgs/development/python-modules/google-cloud-texttospeech/default.nix
index 06c1eeb857f9..05ac66c0875f 100644
--- a/pkgs/development/python-modules/google-cloud-texttospeech/default.nix
+++ b/pkgs/development/python-modules/google-cloud-texttospeech/default.nix
@@ -11,11 +11,11 @@
 
 buildPythonPackage rec {
   pname = "google-cloud-texttospeech";
-  version = "2.9.0";
+  version = "2.9.1";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "e8e272ab54be00285c8f9451081d833980c9fc2a1eff828448dfe315dfa61250";
+    sha256 = "0a76bed3cf48cf72d4aa50329d5da2bbc008c5c7dd57326854fc038536e107f1";
   };
 
   propagatedBuildInputs = [ libcst google-api-core proto-plus ];