diff --git a/package.json b/package.json
index b4628587..42199ddf 100644
--- a/package.json
+++ b/package.json
@@ -63,9 +63,9 @@
   "devDependencies": {
     "@commitlint/cli": "12.1.4",
     "@commitlint/config-angular": "12.1.4",
-    "@nestjs/common": "7.6.15",
-    "@nestjs/core": "7.6.15",
-    "@nestjs/testing": "7.6.15",
+    "@nestjs/common": "7.6.18",
+    "@nestjs/core": "7.6.18",
+    "@nestjs/testing": "7.6.18",
     "@types/glob": "7.1.3",
     "@types/inline-css": "3.0.0",
     "@types/jest": "26.0.23",
diff --git a/sample/01-basic/package.json b/sample/01-basic/package.json
index 7b9e5612..ccc50fa3 100644
--- a/sample/01-basic/package.json
+++ b/sample/01-basic/package.json
@@ -21,9 +21,9 @@
   },
   "dependencies": {
     "@nestjs-modules/mailer": "../../dist",
-    "@nestjs/common": "7.6.15",
-    "@nestjs/core": "7.6.15",
-    "@nestjs/platform-express": "7.6.15",
+    "@nestjs/common": "7.6.18",
+    "@nestjs/core": "7.6.18",
+    "@nestjs/platform-express": "7.6.18",
     "dotenv": "8.6.0",
     "nodemailer": "6.6.1",
     "reflect-metadata": "0.1.13",
@@ -33,7 +33,7 @@
   "devDependencies": {
     "@nestjs/cli": "7.6.0",
     "@nestjs/schematics": "7.3.1",
-    "@nestjs/testing": "7.6.15",
+    "@nestjs/testing": "7.6.18",
     "@types/express": "4.17.11",
     "@types/jest": "26.0.23",
     "@types/node": "13.13.50",
diff --git a/sample/02-custom-template-adapter/package.json b/sample/02-custom-template-adapter/package.json
index 8f5b2af6..205c8ece 100644
--- a/sample/02-custom-template-adapter/package.json
+++ b/sample/02-custom-template-adapter/package.json
@@ -22,9 +22,9 @@
   },
   "dependencies": {
     "@nestjs-modules/mailer": "../../dist",
-    "@nestjs/common": "7.6.15",
-    "@nestjs/core": "7.6.15",
-    "@nestjs/platform-express": "7.6.15",
+    "@nestjs/common": "7.6.18",
+    "@nestjs/core": "7.6.18",
+    "@nestjs/platform-express": "7.6.18",
     "nodemailer": "6.6.1",
     "reflect-metadata": "0.1.13",
     "rimraf": "3.0.2",
@@ -34,7 +34,7 @@
   "devDependencies": {
     "@nestjs/cli": "7.6.0",
     "@nestjs/schematics": "7.3.1",
-    "@nestjs/testing": "7.6.15",
+    "@nestjs/testing": "7.6.18",
     "@types/express": "4.17.11",
     "@types/jest": "26.0.23",
     "@types/node": "13.13.50",
diff --git a/yarn.lock b/yarn.lock
index f981a84c..74448b49 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -658,36 +658,36 @@
   resolved "https://registry.yarnpkg.com/@jonkemp/package-utils/-/package-utils-1.0.6.tgz#94d55258e0ca1b70684632edbfdeb4601c958f64"
   integrity sha512-/xb8uaOiW6C/QKCDfSJzFUThPRpwerxvthKnzxkoB29u/CSIBY1Vp9mkbl8DwTx4dx9jnhSV2bS3tWL0pPHuAg==
 
-"@nestjs/common@7.6.15":
-  version "7.6.15"
-  resolved "https://registry.yarnpkg.com/@nestjs/common/-/common-7.6.15.tgz#ae96f18cb6209a21724ffa7ed1a182be1e4fd0af"
-  integrity sha512-H/3Nk7M02Fc4YN9St05i34gZKVuzE54gd5eXAX6WwisqU5fQ00kss1pYGbltjb2QGu3A/fpO1MdYEwOA18Z/VQ==
+"@nestjs/common@7.6.18":
+  version "7.6.18"
+  resolved "https://registry.yarnpkg.com/@nestjs/common/-/common-7.6.18.tgz#d89e6d248985eec13af60507a8725cb2142d660a"
+  integrity sha512-BUJQHNhWzwWOkS4Ryndzd4HTeRObcAWV2Fh+ermyo3q3xYQQzNoEWclJVL/wZec8AONELwIJ+PSpWI53VP0leg==
   dependencies:
     axios "0.21.1"
     iterare "1.2.1"
-    tslib "2.1.0"
+    tslib "2.2.0"
     uuid "8.3.2"
 
-"@nestjs/core@7.6.15":
-  version "7.6.15"
-  resolved "https://registry.yarnpkg.com/@nestjs/core/-/core-7.6.15.tgz#dfcc5a7804c10d07f81dde514804b484b909d08a"
-  integrity sha512-8CrL/iY5Gt4HJfyDg1PgPalhT7tVRT643f2mGMgPum/P/e94uuwEYBNIgsMEVOJUrOAWZkNIN60uEf8JkH6GWw==
+"@nestjs/core@7.6.18":
+  version "7.6.18"
+  resolved "https://registry.yarnpkg.com/@nestjs/core/-/core-7.6.18.tgz#36448f0ae7f7d08f032e1e7e53b4a4c82ae844d7"
+  integrity sha512-CGu20OjIxgFDY7RJT5t1TDGL8wSlTSlbZEkn8U5OlICZEB3WIpi98G7ajJpnRWmEgW8S4aDJmRKGjT+Ntj5U4A==
   dependencies:
     "@nuxtjs/opencollective" "0.3.2"
     fast-safe-stringify "2.0.7"
     iterare "1.2.1"
     object-hash "2.1.1"
     path-to-regexp "3.2.0"
-    tslib "2.1.0"
+    tslib "2.2.0"
     uuid "8.3.2"
 
-"@nestjs/testing@7.6.15":
-  version "7.6.15"
-  resolved "https://registry.yarnpkg.com/@nestjs/testing/-/testing-7.6.15.tgz#eed34846a8b2b5ddb0ff6bd74cdcb4344c364c40"
-  integrity sha512-AWr8stnRoS0yCU/EotAJKveYXm1XSB4ZT+ReqFDXhPyqC1ppOfU+zZuCjQlQHorMzidsVHsAstK5/rUsXnrZUQ==
+"@nestjs/testing@7.6.18":
+  version "7.6.18"
+  resolved "https://registry.yarnpkg.com/@nestjs/testing/-/testing-7.6.18.tgz#b4c137b5b6c2fb18c51602d33a083cd97c648283"
+  integrity sha512-1AVk9vWZlPpx4CmzY6z9z0DHFgGCadfr01QdisGFAN740JwKqZWEqz12cVd+nsXDlYQPFRkp2ICBIS/6k1qZGQ==
   dependencies:
     optional "0.1.4"
-    tslib "2.1.0"
+    tslib "2.2.0"
 
 "@nodelib/fs.scandir@2.1.3":
   version "2.1.3"
@@ -6556,10 +6556,10 @@ ts-node@9.1.1:
     source-map-support "^0.5.17"
     yn "3.1.1"
 
-tslib@2.1.0:
-  version "2.1.0"
-  resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.1.0.tgz#da60860f1c2ecaa5703ab7d39bc05b6bf988b97a"
-  integrity sha512-hcVC3wYEziELGGmEEXue7D75zbwIIVUMWAVbHItGPx0ziyXxrOMQx4rQEVEV45Ut/1IotuEvwqPopzIOkDMf0A==
+tslib@2.2.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/tslib/-/tslib-2.2.0.tgz#fb2c475977e35e241311ede2693cee1ec6698f5c"
+  integrity sha512-gS9GVHRU+RGn5KQM2rllAlR3dU6m7AcpJKdtH8gFvQiC4Otgk98XnmMU+nZenHt/+VhnBPWwgrJsyrdcw6i23w==
 
 tslib@^1.8.1, tslib@^1.9.0:
   version "1.11.2"