diff --git a/package-lock.json b/package-lock.json
index cd782f3f..5cd85f88 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -13870,15 +13870,16 @@
       }
     },
     "markdownlint-cli": {
-      "version": "0.20.0",
-      "resolved": "https://registry.npmjs.org/markdownlint-cli/-/markdownlint-cli-0.20.0.tgz",
-      "integrity": "sha512-5VCGS+9w/mVMVDHrKOciq+ZXYdFEypyuCvCdNjHdji8itqcryWMr7V2NdpxQ/KeJmMNoRYsdc2R+88lSc+2gpA==",
+      "version": "0.21.0",
+      "resolved": "https://registry.npmjs.org/markdownlint-cli/-/markdownlint-cli-0.21.0.tgz",
+      "integrity": "sha512-gvnczz3W3Wgex851/cIQ/2y8GNhY+EVK8Ael8kRd8hoSQ0ps9xjhtwPwMyJPoiYbAoPxG6vSBFISiysaAbCEZg==",
       "dev": true,
       "requires": {
         "commander": "~2.9.0",
         "deep-extend": "~0.5.1",
         "get-stdin": "~5.0.1",
         "glob": "~7.1.2",
+        "ignore": "~5.1.4",
         "js-yaml": "~3.13.1",
         "jsonc-parser": "~2.2.0",
         "lodash.differencewith": "~4.5.0",
@@ -13909,6 +13910,12 @@
           "resolved": "https://registry.npmjs.org/get-stdin/-/get-stdin-5.0.1.tgz",
           "integrity": "sha1-Ei4WFZHiH/TFJTAwVpPyDmOTo5g=",
           "dev": true
+        },
+        "ignore": {
+          "version": "5.1.4",
+          "resolved": "https://registry.npmjs.org/ignore/-/ignore-5.1.4.tgz",
+          "integrity": "sha512-MzbUSahkTW1u7JpKKjY7LCARd1fU5W2rLdxlM4kdkayuCwZImjkpluF9CM1aLewYJguPDqewLam18Y6AU69A8A==",
+          "dev": true
         }
       }
     },
diff --git a/package.json b/package.json
index 738bf78d..a5d13831 100644
--- a/package.json
+++ b/package.json
@@ -122,7 +122,7 @@
     "gatsby-plugin-webpack-bundle-analyser-v2": "^1.1.8",
     "identity-obj-proxy": "^3.0.0",
     "jest": "^24.9.0",
-    "markdownlint-cli": "^0.20.0",
+    "markdownlint-cli": "^0.21.0",
     "node-iptc": "^1.0.5",
     "node-sass": "^4.13.0",
     "npm-run-all": "^4.1.5",