diff --git a/projects/ngx-captcha-lib/package.json b/projects/ngx-captcha-lib/package.json
index c72e4ed..ed8cb2f 100644
--- a/projects/ngx-captcha-lib/package.json
+++ b/projects/ngx-captcha-lib/package.json
@@ -23,7 +23,8 @@
   "scripts": {
     "build:lib": "ng build ngx-captcha-lib",
     "publish:lib": "npm run build:lib && npm publish dist",
-    "prepublishOnly": "npm run build:lib"
+    "prepublishOnly": "npm run prevent-publish",
+    "prevent-publish": "node prevent-publish"
   },
   "peerDependencies": {
     "@angular/common": "^7.0.0",
diff --git a/projects/ngx-captcha-lib/prevent-publish.js b/projects/ngx-captcha-lib/prevent-publish.js
new file mode 100644
index 0000000..575c50a
--- /dev/null
+++ b/projects/ngx-captcha-lib/prevent-publish.js
@@ -0,0 +1 @@
+throw Error(`Direct publish to npm is forbidden. Use 'npm run publish:lib' npm script instead`);
\ No newline at end of file