diff --git a/versions/2.18.3/package.json b/versions/2.18.3/package.json
index 1f219e93..aad83372 100644
--- a/versions/2.18.3/package.json
+++ b/versions/2.18.3/package.json
@@ -89,7 +89,7 @@
     "markdown-it-mark": "2.0.0",
     "mobiledoc-dom-renderer": "0.6.5",
     "moment": "2.24.0",
-    "moment-timezone": "0.5.23",
+    "moment-timezone": "0.5.35",
     "multer": "1.4.1",
     "mysql": "2.16.0",
     "nconf": "0.10.0",
diff --git a/versions/2.18.3/yarn.lock b/versions/2.18.3/yarn.lock
index 7086f80f..ff3303ec 100644
--- a/versions/2.18.3/yarn.lock
+++ b/versions/2.18.3/yarn.lock
@@ -4196,9 +4196,10 @@ module-not-found-error@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/module-not-found-error/-/module-not-found-error-1.0.1.tgz#cf8b4ff4f29640674d6cdd02b0e3bc523c2bbdc0"
 
-moment-timezone@0.5.23:
-  version "0.5.23"
-  resolved "https://registry.yarnpkg.com/moment-timezone/-/moment-timezone-0.5.23.tgz#7cbb00db2c14c71b19303cb47b0fb0a6d8651463"
+moment-timezone@0.5.35:
+  version "0.5.35"
+  resolved "https://registry.yarnpkg.com/moment-timezone/-/moment-timezone-0.5.35.tgz#6fa2631bdbe8ff04f6b8753f7199516be6dc9839"
+  integrity sha512-cY/pBOEXepQvlgli06ttCTKcIf8cD1nmNwOKQQAdHBqYApQSpAqotBMX0RJZNgMp6i0PlZuf1mFtnlyEkwyvFw==
   dependencies:
     moment ">= 2.9.0"