diff --git a/charts/mastodon/Chart.lock b/charts/mastodon/Chart.lock
index 82ae9463b34f19847f338db4a592ad06b901ba9e..f8a87717df0f8a25e0f7e2c14f775310bb5d94c5 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: 21.1.2
+digest: sha256:5de8ca9bc3f1ab4bc376afe14c8df79a2de4d4ba3fc1c76c0467fe56620c4785
+generated: "2025-05-16T03:29:10.86331331Z"
diff --git a/charts/mastodon/Chart.yaml b/charts/mastodon/Chart.yaml
index 17d4b9ce26220a46dd3368303dae79cd61eb7ff5..c1428ec08b7ffc175940fb0b04473c99f02e7cba 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: 21.1.2
     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-21.1.2.tgz b/charts/mastodon/charts/redis-21.1.2.tgz
new file mode 100644
index 0000000000000000000000000000000000000000..8af03b46ce1b19b60e85954ccca41ab7c0170f99
Binary files /dev/null and b/charts/mastodon/charts/redis-21.1.2.tgz differ
diff --git a/charts/nextcloud/Chart.lock b/charts/nextcloud/Chart.lock
index 32ef72594287caf989c4e90e85bf3c39423a8309..a3943da14810275427b51f2ab192390fcb619f2e 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: 21.1.2
+digest: sha256:eff82f1d9da6db5e5f7b6b6067741e83f9870fefa69005f09f278535778d91a8
+generated: "2025-05-16T03:29:48.408273588Z"
diff --git a/charts/nextcloud/Chart.yaml b/charts/nextcloud/Chart.yaml
index 0e0e75b750f34831d2a77c480768e761ca34688c..c5612a2a56a4455e84190a2b3193bbee0de8c8c4 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: 21.1.2
   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-21.1.2.tgz b/charts/nextcloud/charts/redis-21.1.2.tgz
new file mode 100644
index 0000000000000000000000000000000000000000..8af03b46ce1b19b60e85954ccca41ab7c0170f99
Binary files /dev/null and b/charts/nextcloud/charts/redis-21.1.2.tgz differ