diff --git a/ci/requirements-docs.txt b/ci/requirements-docs.txt
index f0519c4c..b50aaf00 100644
--- a/ci/requirements-docs.txt
+++ b/ci/requirements-docs.txt
@@ -35,5 +35,5 @@ sphinxcontrib-htmlhelp==1.0.3  # via sphinx
 sphinxcontrib-jsmath==1.0.1  # via sphinx
 sphinxcontrib-qthelp==1.0.3  # via sphinx
 sphinxcontrib-serializinghtml==1.1.4  # via sphinx
-urllib3==1.26.5           # via requests
+urllib3==1.26.17           # via requests
 xarray==0.15.1