diff --git a/src/perun/requirements.txt b/src/perun/requirements.txt
index 76e0367..209f245 100644
--- a/src/perun/requirements.txt
+++ b/src/perun/requirements.txt
@@ -1,7 +1,7 @@
 --extra-index-url https://git.gansejunge.com/api/packages/notifier/pypi/simple/
 bcrypt==5.0.0
 Brotli==1.1.0
-certifi==2025.10.5
+certifi==2026.10.19
 cffi==2.0.0
 charset-normalizer==3.4.3
 cryptography==46.0.2