diff --git a/lib/jenkins_api_client/plugin_manager.rb b/lib/jenkins_api_client/plugin_manager.rb
index ff74f121..7894d68a 100644
--- a/lib/jenkins_api_client/plugin_manager.rb
+++ b/lib/jenkins_api_client/plugin_manager.rb
@@ -123,7 +123,7 @@ def list_installed(filters = {})
           if filters.keys.all? { |key| plugin[key.to_s] == filters[key] }
             [plugin["shortName"], plugin["version"]]
           end
-        end]
+        end.compact]
         installed
       end