diff --git a/pkgs/development/python-modules/pglast/default.nix b/pkgs/development/python-modules/pglast/default.nix
index 4edaa22bb16d..d6db6b08c865 100644
--- a/pkgs/development/python-modules/pglast/default.nix
+++ b/pkgs/development/python-modules/pglast/default.nix
@@ -8,14 +8,14 @@
 
 buildPythonPackage rec {
   pname = "pglast";
-  version = "5.5";
+  version = "5.6";
   format = "setuptools";
 
   disabled = pythonOlder "3.7";
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-yz6Q+Vt7ZuT9NaxuQQA+BH7U6Efaim7No6GJmnOQo1o=";
+    hash = "sha256-WHFc8rXzdcRrp1U6tAuepQYagFYo8+0WQr8783w/Ql8=";
   };
 
   propagatedBuildInputs = [