diff --git a/plugin.json b/plugin.json
index ce66af4..930cbbc 100644
--- a/plugin.json
+++ b/plugin.json
@@ -3,5 +3,6 @@
   "version": 1.0,
   "name": "crystals",
   "url": "https://github.com/openchemistry/crystals",
-  "description": "Set of over 500 common crystal structures."
+  "description": "Set of over 500 common crystal structures.",
+  "type": "data"
 }