diff --git a/requirements.txt b/requirements.txt
index 5ccd486..44655cd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -28,7 +28,7 @@ numpy==1.16.4
 oauth2client==4.1.3
 pyasn1==0.4.5
 pyasn1-modules==0.2.5
-pycares==3.0.0
+pycares==4.2.0
 pycparser==2.19
 pyparsing==2.4.0
 python-dateutil==2.8.0