diff --git a/lib/spack/docs/requirements.txt b/lib/spack/docs/requirements.txt
index 3b988d18943735..159bc17bc87881 100644
--- a/lib/spack/docs/requirements.txt
+++ b/lib/spack/docs/requirements.txt
@@ -6,7 +6,7 @@ furo==2025.7.19
 python-levenshtein==0.27.1
 docutils==0.21.2
 pygments==2.19.2
-urllib3==2.5.0
+urllib3==2.6.0
 pytest==8.4.1
 isort==6.0.1
 black==25.1.0