diff --git a/tool/docsite/requirements_lock.txt b/tool/docsite/requirements_lock.txt
index 2914fde9a..1831c8c9e 100644
--- a/tool/docsite/requirements_lock.txt
+++ b/tool/docsite/requirements_lock.txt
@@ -16,9 +16,9 @@ backrefs==8.0 \
     --hash=sha256:b556cd7d36c3a3a2f256b89590b176b8eddfb73bcfaee3a3ddd84ea66d21ce50 \
     --hash=sha256:f0c35cf0102ba6b6070c12a492be3c1c1d3f5839529784b9a9565d6d04569a01
     # via mkdocs-material
-certifi==2026.7.22 \
-    --hash=sha256:62f22742b58a1a33014a2b6b706588a8d7e2a88ae7bd1a6ebe8c992928483775 \
-    --hash=sha256:741e2c3b351ddf169a738da9f2c048608ff7f2c5cc02f1ebc6b118bb090d5d55
+certifi==2026.10.19 \
+    --hash=sha256:035c1e85572b141bf1c3a3eff0e33a8eb74917522f2559075ff8d2fea780a1ae \
+    --hash=sha256:42d35340cc5b9ba78e818ddbff0c5b1c2b779de448a340fd1b989f5fa8670e1b
     # via requests
 charset-normalizer==3.5.2 \
     --hash=sha256:01077390b03f7988f11d700a2194e69b119741a86b1a638b1db88891e3eced8e \