diff --git a/requirements/ci.txt b/requirements/ci.txt
index b02d489..c99a2ce 100644
--- a/requirements/ci.txt
+++ b/requirements/ci.txt
@@ -4,7 +4,7 @@
 #
 #    make upgrade
 #
-cachetools==5.4.0
+cachetools==5.5.0
     # via
     #   -r requirements/tox.txt
     #   tox
diff --git a/requirements/tox.txt b/requirements/tox.txt
index b9733b2..2b359ec 100644
--- a/requirements/tox.txt
+++ b/requirements/tox.txt
@@ -4,7 +4,7 @@
 #
 #    make upgrade
 #
-cachetools==5.4.0
+cachetools==5.5.0
     # via tox
 chardet==5.2.0
     # via tox