diff --git a/package-lock.json b/package-lock.json
index 576e6e6..46e2c67 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1584,9 +1584,9 @@
       }
     },
     "marked": {
-      "version": "0.3.19",
-      "resolved": "https://registry.npmjs.org/marked/-/marked-0.3.19.tgz",
-      "integrity": "sha512-ea2eGWOqNxPcXv8dyERdSr/6FmzvWwzjMxpfGB/sbMccXoct+xY+YukPD+QTUZwyvK7BZwcr4m21WBOW41pAkg=="
+      "version": "4.0.10",
+      "resolved": "https://registry.npmjs.org/marked/-/marked-4.0.10.tgz",
+      "integrity": "sha512-+QvuFj0nGgO970fySghXGmuw+Fd0gD2x3+MqCWLIPf5oxdv1Ka6b2q+z9RP01P/IaKPMEramy+7cNy/Lw8c3hw=="
     },
     "merge2": {
       "version": "1.2.2",
diff --git a/package.json b/package.json
index 41605f7..e139ab8 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
   "main": "marked-element.js",
   "author": "The Polymer Project Authors (https://polymer.github.io/AUTHORS.txt)",
   "dependencies": {
-    "marked": "~0.3.9",
+    "marked": "~4.0.10",
     "@polymer/polymer": "^3.0.0"
   }
 }