diff --git a/requirements.txt b/requirements.txt
index 5200a8a3..51b8b008 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,6 +2,7 @@ aiodns==2.0.0
 beautifulsoup4==4.8.0
 dnspython==1.16.0
 flake8==3.7.8
+gevent==1.4.0 
 grequests==0.4.0
 lxml==4.4.1
 mypy==0.740
@@ -12,4 +13,4 @@ PyYaml==5.1.2
 requests==2.22.0
 shodan==1.19.0
 texttable==1.6.2
-retrying==1.3.3
\ No newline at end of file
+retrying==1.3.3