diff --git a/flake.lock b/flake.lock
index 58d6972..559f116 100644
--- a/flake.lock
+++ b/flake.lock
@@ -66,11 +66,11 @@
     },
     "nixpkgs_2": {
       "locked": {
-        "lastModified": 1757810152,
-        "narHash": "sha256-Vp9K5ol6h0J90jG7Rm4RWZsCB3x7v5VPx588TQ1dkfs=",
+        "lastModified": 1753115646,
+        "narHash": "sha256-yLuz5cz5Z+sn8DRAfNkrd2Z1cV6DaYO9JMrEz4KZo/c=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "9a094440e02a699be5c57453a092a8baf569bdad",
+        "rev": "92c2e04a475523e723c67ef872d8037379073681",
         "type": "github"
       },
       "original": {
@@ -95,11 +95,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1758007585,
-        "narHash": "sha256-HYnwlbY6RE5xVd5rh0bYw77pnD8lOgbT4mlrfjgNZ0c=",
+        "lastModified": 1752544651,
+        "narHash": "sha256-GllP7cmQu7zLZTs9z0J2gIL42IZHa9CBEXwBY9szT0U=",
         "owner": "Mic92",
         "repo": "sops-nix",
-        "rev": "f77d4cfa075c3de66fc9976b80e0c4fc69e2c139",
+        "rev": "2c8def626f54708a9c38a5861866660395bb3461",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 39183bf..e8a53a9 100644
--- a/flake.nix
+++ b/flake.nix
@@ -41,6 +41,22 @@
         prometheus-exporter = ./config/extra/prometheus-exporter.nix;
       };
       overlays = {
+        matrixSynapseFix = final: prev: {
+          matrix-synapse-unwrapped = prev.matrix-synapse-unwrapped.overrideAttrs (finalAttrs: prevAttrs: rec {
+            version = "1.135.2";
+            src = prev.fetchFromGitHub {
+              owner = "element-hq";
+              repo = "synapse";
+              rev = "v${version}";
+              hash = "sha256-4HAA9Xq4C3DHxz0BgqBitfM4wZwPSEu+IO/OPfHzLVw=";
+            };
+            cargoDeps = final.rustPlatform.fetchCargoVendor {
+              inherit src;
+              hash = "sha256-4J92s6cSgsEIYQpbU6OOLI/USIJX2Gc7UdEHgWQgmXc=";
+            };
+            patches = [];
+          });
+        };
         librespotFixOverlay = final: prev: {
           librespot = (prev.librespot.override { withAvahi = true; }).overrideAttrs (finalAttrs: prevAttr: rec {
             # Build dev branch.
@@ -109,6 +125,7 @@
             sops-nix.nixosModules.sops
             self.nixosModules.prometheus-exporter
             ./config/hosts/matrix
+            { nixpkgs.overlays = [ self.overlays.matrixSynapseFix ]; }
           ];
         };