diff --git a/package-lock.json b/package-lock.json
index a966f99..89dcacc 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9496,9 +9496,9 @@
             "dev": true
         },
         "highlight.js": {
-            "version": "9.13.1",
-            "resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-9.13.1.tgz",
-            "integrity": "sha512-Sc28JNQNDzaH6PORtRLMvif9RSn1mYuOoX3omVjnb0+HbpPygU2ALBI0R/wsiqCb4/fcp07Gdo8g+fhtFrQl6A=="
+            "version": "9.18.1",
+            "resolved": "https://registry.npmjs.org/highlight.js/-/highlight.js-9.18.1.tgz",
+            "integrity": "sha512-OrVKYz70LHsnCgmbXctv/bfuvntIKDz177h0Co37DQ5jamGZLVmoCVMtjMtNZY3X9DrCcKfklHPNeA0uPZhSJg=="
         },
         "history": {
             "version": "4.7.2",
@@ -12675,9 +12675,9 @@
             }
         },
         "mobx": {
-            "version": "5.8.0",
-            "resolved": "https://registry.npmjs.org/mobx/-/mobx-5.8.0.tgz",
-            "integrity": "sha512-NsZB+9bF5j+nv9Qwk6bNeE3np26a4TbTGkMpOLf6o1zXoM9BtHPQn/00px4uZ2AXJXtQML5P4MEWdMm6icMIfQ=="
+            "version": "5.15.4",
+            "resolved": "https://registry.npmjs.org/mobx/-/mobx-5.15.4.tgz",
+            "integrity": "sha512-xRFJxSU2Im3nrGCdjSuOTFmxVDGeqOHL+TyADCGbT0k4HHqGmx5u2yaHNryvoORpI4DfbzjJ5jPmuv+d7sioFw=="
         },
         "mobx-react": {
             "version": "5.4.3",
diff --git a/package.json b/package.json
index 214fa6b..f0a60e2 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
     "markdown-it-sup": "^1.0.0",
     "markdown-it-table-of-contents": "^0.4.3",
     "markdown-it-task-lists": "^2.1.1",
-    "mobx": "5.8.0",
+    "mobx": "5.15.4",
     "mobx-react": "5.4.3",
     "opn": "5.4.0",
     "prop-types": "15.6.2",