diff --git a/package-lock.json b/package-lock.json
index c9095cd..9d78e9e 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1064,7 +1064,8 @@
                 "ansi-regex": {
                     "version": "2.1.1",
                     "bundled": true,
-                    "dev": true
+                    "dev": true,
+                    "optional": true
                 },
                 "aproba": {
                     "version": "1.2.0",
@@ -1479,7 +1480,8 @@
                 "safe-buffer": {
                     "version": "5.1.1",
                     "bundled": true,
-                    "dev": true
+                    "dev": true,
+                    "optional": true
                 },
                 "safer-buffer": {
                     "version": "2.1.2",
@@ -1535,6 +1537,7 @@
                     "version": "3.0.1",
                     "bundled": true,
                     "dev": true,
+                    "optional": true,
                     "requires": {
                         "ansi-regex": "2.1.1"
                     }
@@ -1578,12 +1581,14 @@
                 "wrappy": {
                     "version": "1.0.2",
                     "bundled": true,
-                    "dev": true
+                    "dev": true,
+                    "optional": true
                 },
                 "yallist": {
                     "version": "3.0.2",
                     "bundled": true,
-                    "dev": true
+                    "dev": true,
+                    "optional": true
                 }
             }
         },
@@ -2265,20 +2270,11 @@
                 "object-visit": "1.0.1"
             }
         },
-        "marked": {
-            "version": "0.3.19",
-            "resolved": "https://registry.npmjs.org/marked/-/marked-0.3.19.tgz",
-            "integrity": "sha512-ea2eGWOqNxPcXv8dyERdSr/6FmzvWwzjMxpfGB/sbMccXoct+xY+YukPD+QTUZwyvK7BZwcr4m21WBOW41pAkg==",
-            "dev": true
-        },
         "marked-man": {
-            "version": "0.2.1",
-            "resolved": "https://registry.npmjs.org/marked-man/-/marked-man-0.2.1.tgz",
-            "integrity": "sha1-8lknFIHeO1ByY0ifUiG3xaz9I4M=",
-            "dev": true,
-            "requires": {
-                "marked": "0.3.19"
-            }
+            "version": "0.4.0",
+            "resolved": "https://registry.npmjs.org/marked-man/-/marked-man-0.4.0.tgz",
+            "integrity": "sha512-PGGp+QZDE4x0Vymb5lArZDqbn1D5XfYGmksZUkxdPiiq8W0vs9Xljl3Ck43JSWIDxTPz1HiDB5QSTzt7prqI+Q==",
+            "dev": true
         },
         "matchdep": {
             "version": "2.0.0",
diff --git a/package.json b/package.json
index c97b443..f5245f2 100644
--- a/package.json
+++ b/package.json
@@ -48,7 +48,7 @@
         "gulp": "^4.0.0",
         "gulp-clean": "^0.4.0",
         "gulp-typescript": "^5.0.0",
-        "marked-man": "^0.2.1",
+        "marked-man": "^0.4.0",
         "typescript": "^2.9.2"
     },
     "dependencies": {