diff --git a/requirements.txt b/requirements.txt
index 3460bc6..35528a1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -57,7 +57,7 @@ sphinxcontrib-htmlhelp==1.0.3
 sphinxcontrib-jsmath==1.0.1
 sphinxcontrib-qthelp==1.0.3
 sphinxcontrib-serializinghtml==1.1.4
-urllib3==1.26.5
+urllib3==1.25.8
 wcwidth==0.1.8
 Werkzeug==1.0.0
 zipp==3.1.0