diff --git a/requirements.txt b/requirements.txt
index 79b0689..6853b87 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,4 +16,5 @@ wheel==0.31.1
 # Custom packages
 numpy==1.17.3
 netCDF4===1.5.3
-pandas===0.25.3
\ No newline at end of file
+pandas===0.25.3
+urllib3>=1.26.5 # not directly required, pinned by Snyk to avoid a vulnerability
\ No newline at end of file