diff --git a/tools/challenge-parser/package-lock.json b/tools/challenge-parser/package-lock.json
index 2cc28577ce..75067a34e5 100644
--- a/tools/challenge-parser/package-lock.json
+++ b/tools/challenge-parser/package-lock.json
@@ -553,11 +553,22 @@
       }
     },
     "micromark-extension-gfm-strikethrough": {
-      "version": "0.6.1",
-      "resolved": "https://registry.npmjs.org/micromark-extension-gfm-strikethrough/-/micromark-extension-gfm-strikethrough-0.6.1.tgz",
-      "integrity": "sha512-2+5qpceAqPysnjM0bpONY/3Jdnt7PJpns7rEtlwoThV2OOE7ReoQ07lYSAL8y/1sW5NnmF8XylvBdSlGsphEpQ==",
+      "version": "0.6.5",
+      "resolved": "https://registry.npmjs.org/micromark-extension-gfm-strikethrough/-/micromark-extension-gfm-strikethrough-0.6.5.tgz",
+      "integrity": "sha512-PpOKlgokpQRwUesRwWEp+fHjGGkZEejj83k9gU5iXCbDG+XBA92BqnRKYJdfqfkrRcZRgGuPuXb7DaK/DmxOhw==",
       "requires": {
-        "micromark": "~2.10.0"
+        "micromark": "~2.11.0"
+      },
+      "dependencies": {
+        "micromark": {
+          "version": "2.11.4",
+          "resolved": "https://registry.npmjs.org/micromark/-/micromark-2.11.4.tgz",
+          "integrity": "sha512-+WoovN/ppKolQOFIAajxi7Lu9kInbPxFuTBVEavFcL8eAfVstoc5MocPmqBeAdBOJV00uaVjegzH4+MA0DN/uA==",
+          "requires": {
+            "debug": "^4.0.0",
+            "parse-entities": "^2.0.0"
+          }
+        }
       }
     },
     "micromark-extension-gfm-table": {
diff --git a/tools/challenge-parser/package.json b/tools/challenge-parser/package.json
index a417ead17c..50539e0245 100644
--- a/tools/challenge-parser/package.json
+++ b/tools/challenge-parser/package.json
@@ -28,7 +28,7 @@
     "mdast-builder": "1.1.1",
     "mdast-util-gfm": "0.1.2",
     "mdast-util-to-hast": "9.1.2",
-    "micromark-extension-gfm-strikethrough": "0.6.1",
+    "micromark-extension-gfm-strikethrough": "0.6.5",
     "micromark-extension-gfm-table": "0.4.1",
     "remark": "13.0.0",
     "remark-directive": "1.0.1",