diff --git a/doc/requirements.txt b/doc/requirements.txt
index b73e1d5..aa0cf5b 100644
--- a/doc/requirements.txt
+++ b/doc/requirements.txt
@@ -76,7 +76,7 @@ toml==0.10.2
 tqdm==4.64.0
 traitlets==5.1.0
 typing_extensions==4.2.0
-urllib3==1.26.9
+urllib3==1.26.18
 # Do not pin the following
 pennylane-sphinx-theme
 zipp==3.8.0
diff --git a/requirements.txt b/requirements.txt
index 470d9e9..da4c477 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -52,4 +52,4 @@ toml==0.10.2
 tqdm==4.62.2
 traitlets==5.1.0
 typing_extensions==4.2.0
-urllib3==1.26.9
+urllib3==1.26.18