diff --git a/hera_corr_f/control_software/casperfpga/requirements.txt b/hera_corr_f/control_software/casperfpga/requirements.txt
index d4c873b..a4eebf7 100644
--- a/hera_corr_f/control_software/casperfpga/requirements.txt
+++ b/hera_corr_f/control_software/casperfpga/requirements.txt
@@ -56,7 +56,7 @@ traceback2==1.4.0
 traitlets==4.3.2
 typing==3.6.2
 unittest2==1.1.0
-urllib3==1.22
+urllib3==1.26.5
 watchdog==0.8.3
 wcwidth==0.1.7
 -e git://github.com/casper-astro/tftpy.git#egg=tftpy-0.6.3_fork-py2.7.egg