diff --git a/package-lock.json b/package-lock.json
index d51228df..8e0ca035 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -10,9 +10,9 @@
       "integrity": "sha512-ZQYitnqiyBc3D+k7LsgSBmMDVkOVidaagDG7j3fOym77jNunWRuYx7VSHa9GNfFZh+zh61xsCjRj4JxMZlDqTA=="
     },
     "nodemailer": {
-      "version": "6.4.12",
-      "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-6.4.12.tgz",
-      "integrity": "sha512-c/WplZp24Lxc+hn0w/kweNxcYGpaqtH1iecfGKTbXVmp5qx+ILApKsmCAucWWIIQiYKKH4ZA/ffSNOsai6xJGA=="
+      "version": "6.4.13",
+      "resolved": "https://registry.npmjs.org/nodemailer/-/nodemailer-6.4.13.tgz",
+      "integrity": "sha512-XmtiiKza2Cqtr+ZRMchMZn9s2nmwQDeakbf+yL0ODsIXOv58UZgk/MKPOkDKqY+mvxHs87PrJK7Nf/tcpKHqYQ=="
     }
   }
 }
diff --git a/package.json b/package.json
index b467615f..f18b0061 100644
--- a/package.json
+++ b/package.json
@@ -18,6 +18,6 @@
   "homepage": "https://github.com/dawidd6/action-send-mail#readme",
   "dependencies": {
     "@actions/core": "^1.2.6",
-    "nodemailer": "^6.4.12"
+    "nodemailer": "^6.4.13"
   }
 }