diff --git a/fisco_bcos_python_sdk/requirements.txt b/fisco_bcos_python_sdk/requirements.txt
index 63206da..03f4aa7 100644
--- a/fisco_bcos_python_sdk/requirements.txt
+++ b/fisco_bcos_python_sdk/requirements.txt
@@ -48,7 +48,7 @@ six==1.15.0
 sortedcontainers==2.3.0
 toolz==0.11.1
 typing-extensions==3.7.4.3
-urllib3==1.26.3
+urllib3==1.26.5
 varint==1.0.2
 web3==5.17.0
 websockets==8.1