diff --git a/ci/ruby.properties.json b/ci/ruby.properties.json
index a2d6f84..59607b9 100644
--- a/ci/ruby.properties.json
+++ b/ci/ruby.properties.json
@@ -2,5 +2,5 @@
     "name": "Ruby",
     "description": "Build and test a Ruby project with Rake.",
     "iconName": "ruby",
-    "category": "Ruby"
+    "category": ["Ruby"]
 }
\ No newline at end of file