diff --git a/build/requirements.txt b/build/requirements.txt
index 5e9bbe3..ba4dbe7 100644
--- a/build/requirements.txt
+++ b/build/requirements.txt
@@ -95,7 +95,7 @@ terminado==0.8.2
 testpath==0.4.2
 tornado==6.0.2
 traitlets==4.3.2
-urllib3==1.24.2
+urllib3==1.26.5
 wcwidth==0.1.7
 webencodings==0.5.1
 whichcraft==0.5.2