diff --git a/pkgs/servers/matrix-synapse/sliding-sync/default.nix b/pkgs/servers/matrix-synapse/sliding-sync/default.nix
index 25e1c9c205fc..aab70aa8ae3b 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 = "0.99.7";
+  version = "0.99.8";
 
   src = fetchFromGitHub {
     owner = "matrix-org";
     repo = "sliding-sync";
-    rev = "v${version}";
-    hash = "sha256-LSxh7dvw4B0hVcIzbknIpXGOWZYEs+cjO9w4xJxkZps=";
+    rev = "refs/tags/v${version}";
+    hash = "sha256-4rYLHUlHbQ6KnxyXCCLqG4/zfXdZm4KZX1cOg5ITQPk=";
   };
 
   vendorHash = "sha256-JYSpjAgIvQFpYmOTifRXHVB6bSrukqSVhmAAmHylPbQ=";