diff --git a/charts/mastodon/Chart.lock b/charts/mastodon/Chart.lock
index 82ae9463b34f19847f338db4a592ad06b901ba9e..5efdedd7621c5fd394a07a7e99b1c8c1fa1c2f31 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: 21.0.2
+digest: sha256:354732bb16df0e3f5d2e9e51c56ce375698240510600b351af100354b3dff90f
+generated: "2025-05-09T05:31:15.284069661Z"
diff --git a/charts/mastodon/Chart.yaml b/charts/mastodon/Chart.yaml
index 081ad0ea27b3a0b5662af77e789b8c24a5a91a8e..7559b2e5fff4d9a8c790d9b77bdbd0486a3abff3 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: 21.0.2
     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-21.0.2.tgz b/charts/mastodon/charts/redis-21.0.2.tgz
new file mode 100644
index 0000000000000000000000000000000000000000..929e56c441d3a309a549772e34bb9c31862ead41
Binary files /dev/null and b/charts/mastodon/charts/redis-21.0.2.tgz differ
diff --git a/charts/nextcloud/Chart.lock b/charts/nextcloud/Chart.lock
index 32ef72594287caf989c4e90e85bf3c39423a8309..07589d96877560b7fff0be61b1017ad0f16acd64 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: 21.0.2
+digest: sha256:04c22222d750f478d05f2e3801dc81553495cda122197ece03e8a4d4d267ae49
+generated: "2025-05-09T05:31:55.566894357Z"
diff --git a/charts/nextcloud/Chart.yaml b/charts/nextcloud/Chart.yaml
index 0e0e75b750f34831d2a77c480768e761ca34688c..c95da5a21802b3b4ce8816769886092ddbaf1535 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: 21.0.2
   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-21.0.2.tgz b/charts/nextcloud/charts/redis-21.0.2.tgz
new file mode 100644
index 0000000000000000000000000000000000000000..929e56c441d3a309a549772e34bb9c31862ead41
Binary files /dev/null and b/charts/nextcloud/charts/redis-21.0.2.tgz differ