diff --git a/registry.json b/registry.json
index b06be5c..e5bc4c9 100644
--- a/registry.json
+++ b/registry.json
@@ -28,6 +28,7 @@
         "https://github.com/openblock-plugin/arduinoUnoR4Wifi"
     ],
     "extensions": [
+        "https://github.com/openblock-plugin/max6675",
         "https://github.com/openblock-plugin/insertSourceCode",
         "https://github.com/openblock-plugin/l298n",
         "https://github.com/openblock-plugin/lcd",