diff --git a/install/package.json b/install/package.json
index 388b4e4f8c..b90e25a694 100644
--- a/install/package.json
+++ b/install/package.json
@@ -179,7 +179,7 @@
         "mocha-lcov-reporter": "1.3.0",
         "mockdate": "3.0.5",
         "nyc": "18.0.0",
-        "smtp-server": "3.18.3"
+        "smtp-server": "3.18.4"
     },
     "optionalDependencies": {
         "sass-embedded": "1.99.0"