diff --git a/.github/renovate.json b/.github/renovate.json
index e358aee..8077f0b 100644
--- a/.github/renovate.json
+++ b/.github/renovate.json
@@ -13,6 +13,17 @@
       "matchStrings": [
         "#\\s*renovate: image=(?<depName>.*?)\\s+appVersion:\\s*[\"']?(?<currentValue>[\\w+\\.\\-]*)"
       ]
+    },
+    {
+      "fileMatch": [
+        "(^|/)mautrix-synapse/Chart\\.yaml$"
+      ],
+      "matchStrings": [
+        "appVersion:\\s+\"(?<currentValue>v[a-z0-9.-]+)\""
+      ],
+      "depNameTemplate": "dock.mau.dev/mautrix/signal",
+      "datasourceTemplate": "docker",
+      "versioningTemplate": "docker"
     }
   ]
 }