diff --git a/pkgs/development/python-modules/granian/default.nix b/pkgs/development/python-modules/granian/default.nix
index 554bf9e0d676..5bbceb734299 100644
--- a/pkgs/development/python-modules/granian/default.nix
+++ b/pkgs/development/python-modules/granian/default.nix
@@ -19,14 +19,14 @@
 
 buildPythonPackage rec {
   pname = "granian";
-  version = "2.5.5";
+  version = "2.5.6";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "emmett-framework";
     repo = "granian";
     tag = "v${version}";
-    hash = "sha256-+KHszcVpfa3FiWUlSQxHDqxnd/ezWdWt430ULW2+83g=";
+    hash = "sha256-XSDBSl7QWqIN5u48z4H5yPHR+ltRmmmrP0JSmvcCcsA=";
   };
 
   # Granian forces a custom allocator for all the things it runs,
@@ -39,7 +39,7 @@ buildPythonPackage rec {
 
   cargoDeps = rustPlatform.fetchCargoVendor {
     inherit pname version src;
-    hash = "sha256-kul1U002f154ghMqeVuuqizVx2LtIyCkmAA08KyjW3U=";
+    hash = "sha256-zQAHJcBWNx5IT/t2wtm7UeOfVNnvfowcp137TePnwiM=";
   };
 
   nativeBuildInputs = with rustPlatform; [