diff --git a/Buildings/Resources/Documentation/userGuide/requirements.txt b/Buildings/Resources/Documentation/userGuide/requirements.txt
index 7bad0539629..a294a40bf88 100644
--- a/Buildings/Resources/Documentation/userGuide/requirements.txt
+++ b/Buildings/Resources/Documentation/userGuide/requirements.txt
@@ -28,4 +28,4 @@ sphinxcontrib-jsmath==1.0.1
 sphinxcontrib-plantuml==0.22
 sphinxcontrib-qthelp==1.0.3
 sphinxcontrib-serializinghtml==1.1.5
-urllib3==1.26.8
+urllib3==1.26.18
diff --git a/Buildings/Resources/src/fluid/heatpumps/calibration/doc/requirements.txt b/Buildings/Resources/src/fluid/heatpumps/calibration/doc/requirements.txt
index caacda679fa..a82caad2d69 100644
--- a/Buildings/Resources/src/fluid/heatpumps/calibration/doc/requirements.txt
+++ b/Buildings/Resources/src/fluid/heatpumps/calibration/doc/requirements.txt
@@ -28,4 +28,4 @@ sphinxcontrib-jsmath==1.0.1
 sphinxcontrib-plantuml==0.22
 sphinxcontrib-qthelp==1.0.3
 sphinxcontrib-serializinghtml==1.1.5
-urllib3==1.26.8
+urllib3==1.26.18