diff --git a/config.json b/config.json
index 4f4b3d4..3e4e7ba 100644
--- a/config.json
+++ b/config.json
@@ -19,7 +19,7 @@
 		"sane_lists", "smarty", "toc", "attr_list", "tables", "pymdownx.tilde"
 	],
 	"MARKDOWN_EXTENSION_CONFIGS": {
-		"'extra": {
+		"extra": {
 			"footnotes": {
 				"UNIQUE_IDS": true
 			}