diff --git a/setup.py b/setup.py
index 87c8cbc..fd64c83 100644
--- a/setup.py
+++ b/setup.py
@@ -9,6 +9,6 @@
     long_description=open('README.md').read(),
     author='Ben Sadeghipour',
     url='https://github.com/nahamsec/JSParser',
-    install_requires=['safeurl', 'tornado', 'jsbeautifier',
+    install_requires=['safeurl', 'tornado==5.1.1', 'jsbeautifier',
                       'netaddr', 'pycurl', 'BeautifulSoup4'],
 )