diff --git a/requirements/base.txt b/requirements/base.txt
index 44154b3f2..862b91b59 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -14,7 +14,7 @@ babel==2.17.0
     #   sphinx
 beautifulsoup4==4.14.3
     # via pydata-sphinx-theme
-certifi==2025.11.12
+certifi==2026.1.4
     # via requests
 charset-normalizer==3.4.4
     # via requests
diff --git a/requirements/dev.txt b/requirements/dev.txt
index 2e28eb76f..1aa7ea05f 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -25,7 +25,7 @@ beautifulsoup4==4.14.3
     # via
     #   -r requirements/base.txt
     #   pydata-sphinx-theme
-certifi==2025.11.12
+certifi==2026.1.4
     # via
     #   -r requirements/base.txt
     #   requests