diff --git a/lockfiles/py39/requirements.txt b/lockfiles/py39/requirements.txt
index 6147cbb6..64b23dfc 100644
--- a/lockfiles/py39/requirements.txt
+++ b/lockfiles/py39/requirements.txt
@@ -14,9 +14,9 @@ beautifulsoup4==4.15.0 \
     --hash=sha256:288e3ca7d54b06f2ac191970bc275c1939cb46d450b255bf6718b04aa37ab4f7 \
     --hash=sha256:d6f88de62e1d4e38ecb1077eb9724cd0eff29d2a08ca16a401e9b9e93f117cf9
     # via -r requirements.in
-certifi==2026.6.17 \
-    --hash=sha256:024c88eeec92ca068db80f02b8b07c9cef7b9fe261d1d535abfd5abd6f6af432 \
-    --hash=sha256:2227dcbaafe0d2f59279d1762ddddc37783ed4354594f194ffc31d20f41fc3db
+certifi==2026.10.19 \
+    --hash=sha256:035c1e85572b141bf1c3a3eff0e33a8eb74917522f2559075ff8d2fea780a1ae \
+    --hash=sha256:42d35340cc5b9ba78e818ddbff0c5b1c2b779de448a340fd1b989f5fa8670e1b
     # via
     #   httpcore
     #   httpx