diff --git a/requirement.txt b/requirement.txt
index 92e2dcf..c2b03a9 100644
--- a/requirement.txt
+++ b/requirement.txt
@@ -7,4 +7,4 @@ future==0.16.0
 plyvel==1.0.5
 pycrypto==2.6.1
 secp256k1==0.13.2
-urllib3==1.24.2
+urllib3==1.26.5