diff --git a/requirements.in b/requirements.in
index b0d01483..d4df641b 100644
--- a/requirements.in
+++ b/requirements.in
@@ -1,5 +1,5 @@
 Babel==2.17.0
-certifi==2026.2.25
+certifi==2026.4.22
 charset-normalizer==3.4.4
 click==8.3.1
 colorama==0.4.6
diff --git a/requirements.txt b/requirements.txt
index 2f7ab9f0..13dae63b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -18,9 +18,9 @@ backrefs==5.8 \
     --hash=sha256:c67f6638a34a5b8730812f5101376f9d41dc38c43f1fdc35cb54700f6ed4465d \
     --hash=sha256:e3a63b073867dbefd0536425f43db618578528e3896fb77be7141328642a1585
     # via mkdocs-material
-certifi==2026.2.25 \
-    --hash=sha256:027692e4402ad994f1c42e52a4997a9763c646b73e4096e4d5d6db8af1d6f0fa \
-    --hash=sha256:e887ab5cee78ea814d3472169153c2d12cd43b14bd03329a39a9c6e2e80bfba7
+certifi==2026.4.22 \
+    --hash=sha256:3cb2210c8f88ba2318d29b0388d1023c8492ff72ecdde4ebdaddbb13a31b1c4a \
+    --hash=sha256:8d455352a37b71bf76a79caa83a3d6c25afee4a385d632127b6afb3963f1c580
     # via
     #   -r requirements.in
     #   requests