diff --git a/package.json b/package.json
index 8d48e5a..9afb49d 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
     "to-markdown.js"
   ],
   "dependencies": {
-    "mdast-util-to-markdown": "^0.5.0"
+    "mdast-util-to-markdown": "~0.6.0"
   },
   "devDependencies": {
     "mdast-util-from-markdown": "^0.8.0",