diff --git a/pkgs/servers/matrix-synapse/sliding-sync/default.nix b/pkgs/servers/matrix-synapse/sliding-sync/default.nix
index a2c6f79fb338..a83846e6a099 100644
--- a/pkgs/servers/matrix-synapse/sliding-sync/default.nix
+++ b/pkgs/servers/matrix-synapse/sliding-sync/default.nix
@@ -5,13 +5,13 @@
 
 buildGoModule rec {
   pname = "matrix-sliding-sync";
-  version = "0.99.3";
+  version = "0.99.4";
 
   src = fetchFromGitHub {
     owner = "matrix-org";
     repo = "sliding-sync";
     rev = "v${version}";
-    hash = "sha256-lmmOq0gkvrIXQmy3rbTga0cC85t0LWjDOqrH1NWUpdA=";
+    hash = "sha256-s7hQ4qCOhkNS8Mc2HZjFqedtj0KqXMAxVMZRIjPyvOA=";
   };
 
   vendorHash = "sha256-447P2TbBUEHmHubHiiZCrFVCj2/tmEuYFzLo27UyCk4=";