diff --git a/package-lock.json b/package-lock.json
index bb729e8..d74816b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -34,7 +34,7 @@
         "tsd": "^0.30.4"
       },
       "peerDependencies": {
-        "marked": "^12.0.0"
+        "marked": ">=4 <13"
       }
     },
     "node_modules/@aashutoshrathi/word-wrap": {
diff --git a/package.json b/package.json
index f2b8a73..19c2038 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
   },
   "homepage": "https://github.com/markedjs/marked-gfm-heading-id#readme",
   "peerDependencies": {
-    "marked": ">=4 <12"
+    "marked": ">=4 <13"
   },
   "dependencies": {
     "github-slugger": "^2.0.0"