diff --git a/.gitignore b/.gitignore
index 958dfb4..3b5e0de 100644
--- a/.gitignore
+++ b/.gitignore
@@ -58,6 +58,9 @@ typings/
 # dotenv environment variables file
 .env
 
+# IDE
+.idea
+
 # misc
 .DS_Store
 _mobX.jsx
\ No newline at end of file
diff --git a/.nvmrc b/.nvmrc
new file mode 100644
index 0000000..f808958
--- /dev/null
+++ b/.nvmrc
@@ -0,0 +1 @@
+8.15.0
\ No newline at end of file
diff --git a/package.json b/package.json
index 4b5e7ba..e2ea260 100644
--- a/package.json
+++ b/package.json
@@ -35,5 +35,8 @@
   },
   "peerDependencies": {
     "express": "4.x"
+  },
+  "engines": {
+    "node": ">=8.15.0"
   }
 }