diff --git a/requirements.txt b/requirements.txt
index a3d60a5..c3fa42d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,7 +15,7 @@ Cython==0.29.14
 idna==2.8
 multidict==4.5.2
 outcome==1.0.1
-pycares==3.0.0
+pycares==4.2.0
 pycparser==2.19
 requests==2.22.0
 sniffio==1.1.0