diff --git a/pyproject.toml b/pyproject.toml
index 79f4a1f..81417b0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -63,7 +63,7 @@ doc = [
   "python-dateutil==2.9.0.post0",
   "pytz==2026.2",
   "tox==4.54.0",
-  "regex==2025.9.18",
+  "regex==2026.5.9",
   "watchdog==6.0.0"
 ]
 publish = [
diff --git a/requirements.in b/requirements.in
index 3028d39..a172964 100644
--- a/requirements.in
+++ b/requirements.in
@@ -29,7 +29,7 @@ pymdown-extensions>=10.21.3
 pygments>=2.20.0
 python-dateutil==2.9.0.post0
 pytz==2026.2
-regex==2025.9.18
+regex==2026.5.9
 watchdog==6.0.0
 
 # Optional dependencies: publish