diff --git a/.npmrc b/.npmrc
new file mode 100644
index 0000000..4fd0219
--- /dev/null
+++ b/.npmrc
@@ -0,0 +1 @@
+engine-strict=true
\ No newline at end of file
diff --git a/package.json b/package.json
index 792cc94..0d662ef 100644
--- a/package.json
+++ b/package.json
@@ -23,23 +23,26 @@
   ],
   "dependencies": {},
   "devDependencies": {
-    "del": "6.0.0",
-    "extend": "3.0.2",
-    "gulp": "4.0.2",
-    "gulp-clean-css": "4.3.0",
-    "gulp-imagemin": "8.0.0",
-    "gulp-postcss": "9.0.1",
-    "gulp-rename": "2.0.0",
-    "gulp-responsive": "3.0.1",
-    "gulp-sass": "5.1.0",
-    "gulp-seo": "1.0.2",
-    "gulp-typescript": "6.0.0-alpha.1",
-    "gulp-uglify": "3.0.2",
-    "gulp-webserver": "0.9.1",
-    "node-notifier": "10.0.1",
-    "postcss": "8.4.6",
-    "postcss-preset-env": "7.3.3",
-    "sass": "1.49.9",
-    "typescript": "4.5.5"
+    "del": "^6.0.0",
+    "extend": "^3.0.2",
+    "gulp": "^4.0.2",
+    "gulp-clean-css": "^4.3.0",
+    "gulp-imagemin": "^8.0.0",
+    "gulp-postcss": "^9.0.1",
+    "gulp-rename": "^2.0.0",
+    "gulp-responsive": "^3.0.1",
+    "gulp-sass": "^5.1.0",
+    "gulp-seo": "^1.0.2",
+    "gulp-typescript": "^6.0.0-alpha.1",
+    "gulp-uglify": "^3.0.2",
+    "gulp-webserver": "^0.9.1",
+    "node-notifier": "^10.0.1",
+    "postcss": "^8.4.6",
+    "postcss-preset-env": "^7.3.3",
+    "sass": "^1.49.9",
+    "typescript": "^4.5.5"
+  },
+  "engines": {
+    "node": "14.x.x"
   }
 }