diff --git a/pkgs/servers/matrix-synapse/default.nix b/pkgs/servers/matrix-synapse/default.nix
index 608ac6028f4..295881b03a3 100644
--- a/pkgs/servers/matrix-synapse/default.nix
+++ b/pkgs/servers/matrix-synapse/default.nix
@@ -23,11 +23,11 @@ let
 
 in buildPythonApplication rec {
   pname = "matrix-synapse";
-  version = "1.9.0";
+  version = "1.9.1";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0ghmxzk2njid7d7ccggda8a9zx4dg1r59n5ymp8f2n9kxz7z2rj2";
+    sha256 = "13csf18dchm75vw251a7h57diag94vw6rhg8kkkbpi35cibn0cz2";
   };
 
   patches = [