diff --git a/charts/mastodon/Chart.lock b/charts/mastodon/Chart.lock
index 82ae9463b34f19847f338db4a592ad06b901ba9e..bc6885eeaa2fb7e525b2d5282aaf5da6469910f2 100644
--- a/charts/mastodon/Chart.lock
+++ b/charts/mastodon/Chart.lock
@@ -4,6 +4,6 @@ dependencies:
   version: 14.3.3
 - name: redis
   repository: https://raw.githubusercontent.com/bitnami/charts/archive-full-index/bitnami
-  version: 18.17.0
-digest: sha256:8ad6b0ba1cb17d00e969e1d650d52ac47aebbf7f3f5fbf10c1ffff3b175305c3
-generated: "2024-03-12T06:09:42.616059338Z"
+  version: 21.0.3
+digest: sha256:f65cd17c7c466dc27371861fb80b32a10eebf2693432144b19661b253c674ce8
+generated: "2025-05-14T06:26:25.990661139Z"
diff --git a/charts/mastodon/Chart.yaml b/charts/mastodon/Chart.yaml
index 17d4b9ce26220a46dd3368303dae79cd61eb7ff5..d4a3348cbc168b16d18815d44823dc297190b3e0 100644
--- a/charts/mastodon/Chart.yaml
+++ b/charts/mastodon/Chart.yaml
@@ -28,6 +28,6 @@ dependencies:
     repository: https://raw.githubusercontent.com/bitnami/charts/archive-full-index/bitnami
     condition: postgresql.enabled
   - name: redis
-    version: 18.17.0
+    version: 21.0.3
     repository: https://raw.githubusercontent.com/bitnami/charts/archive-full-index/bitnami
     condition: redis.enabled
diff --git a/charts/mastodon/charts/redis-18.17.0.tgz b/charts/mastodon/charts/redis-18.17.0.tgz
deleted file mode 100644
index 732dbe880c9bcb12919a6cfb0c6351257198a2c7..0000000000000000000000000000000000000000
Binary files a/charts/mastodon/charts/redis-18.17.0.tgz and /dev/null differ
diff --git a/charts/mastodon/charts/redis-21.0.3.tgz b/charts/mastodon/charts/redis-21.0.3.tgz
new file mode 100644
index 0000000000000000000000000000000000000000..b2ba1e306210c9333d8984db97226597cdf7b0a1
Binary files /dev/null and b/charts/mastodon/charts/redis-21.0.3.tgz differ
diff --git a/charts/nextcloud/Chart.lock b/charts/nextcloud/Chart.lock
index 32ef72594287caf989c4e90e85bf3c39423a8309..799781846e1a9170de948de7631e5f409ba10cb9 100644
--- a/charts/nextcloud/Chart.lock
+++ b/charts/nextcloud/Chart.lock
@@ -7,6 +7,6 @@ dependencies:
   version: 13.1.3
 - name: redis
   repository: https://charts.bitnami.com/bitnami
-  version: 18.17.0
-digest: sha256:b7b502371b93af8269dd1f5b1962e2e45c7212765c38ce356d7e9a99e0adf528
-generated: "2024-03-12T06:09:03.896701074Z"
+  version: 21.0.3
+digest: sha256:844fb1ad5cd4721781d1a9a16fc5f91469ffc519455de6590c76138fc873ae8a
+generated: "2025-05-14T06:27:02.755762164Z"
diff --git a/charts/nextcloud/Chart.yaml b/charts/nextcloud/Chart.yaml
index 0e0e75b750f34831d2a77c480768e761ca34688c..046f00bd4c6bc4b452c9706e01add0bb6cf7ca1f 100644
--- a/charts/nextcloud/Chart.yaml
+++ b/charts/nextcloud/Chart.yaml
@@ -32,6 +32,6 @@ dependencies:
   repository: https://charts.bitnami.com/bitnami
   condition: mariadb.enabled
 - name: redis
-  version: 18.17.0
+  version: 21.0.3
   repository: https://charts.bitnami.com/bitnami
   condition: redis.enabled
diff --git a/charts/nextcloud/charts/redis-18.17.0.tgz b/charts/nextcloud/charts/redis-18.17.0.tgz
deleted file mode 100644
index 732dbe880c9bcb12919a6cfb0c6351257198a2c7..0000000000000000000000000000000000000000
Binary files a/charts/nextcloud/charts/redis-18.17.0.tgz and /dev/null differ
diff --git a/charts/nextcloud/charts/redis-21.0.3.tgz b/charts/nextcloud/charts/redis-21.0.3.tgz
new file mode 100644
index 0000000000000000000000000000000000000000..b2ba1e306210c9333d8984db97226597cdf7b0a1
Binary files /dev/null and b/charts/nextcloud/charts/redis-21.0.3.tgz differ