diff --git a/pkgs/development/python-modules/pq/default.nix b/pkgs/development/python-modules/pq/default.nix
index ff1433725fca..37cd041424cd 100644
--- a/pkgs/development/python-modules/pq/default.nix
+++ b/pkgs/development/python-modules/pq/default.nix
@@ -6,12 +6,12 @@
 
 buildPythonPackage rec {
   pname = "pq";
-  version = "1.9.0";
+  version = "1.9.1";
   disabled = isPy27;
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "c664ee3a9a25efcb583e3d1d797588fb7c2fb5096220689eec78a7946b01b5ff";
+    sha256 = "sha256-1krw77ij69EbLg5mKmQmxeHpn38uRG9EOboGmRk+StY=";
   };
 
   # tests require running postgresql cluster