diff --git a/charts/stable/misskey/Chart.yaml b/charts/stable/misskey/Chart.yaml
index 1adb8a91917..f428a221723 100644
--- a/charts/stable/misskey/Chart.yaml
+++ b/charts/stable/misskey/Chart.yaml
@@ -9,7 +9,7 @@ annotations:
   trueforge.org/min_helm_version: "3.14"
   trueforge.org/train: stable
 apiVersion: v2
-appVersion: 2026.5.0
+appVersion: 2026.5.1
 dependencies:
   - name: common
     version: 29.2.8
@@ -47,5 +47,5 @@ sources:
   - https://github.com/trueforge-org/truecharts/tree/master/charts/stable/misskey
   - https://hub.docker.com/r/misskey/misskey
 type: application
-version: 17.5.0
+version: 17.5.1
 
diff --git a/charts/stable/misskey/values.yaml b/charts/stable/misskey/values.yaml
index 770479a5f40..4b8c56649be 100644
--- a/charts/stable/misskey/values.yaml
+++ b/charts/stable/misskey/values.yaml
@@ -2,7 +2,7 @@
 image:
   repository: docker.io/misskey/misskey
   pullPolicy: IfNotPresent
-  tag: 2026.5.0@sha256:b056c3db799d147520f3fb9a3e0dd402e56dcbb8302cb813ab244d5388064ebb
+  tag: 2026.5.1@sha256:5c2d05623a420871fdf7d22932bacd0422244a25b334198d58d0e95e6e5816ef
 
 securityContext:
   pod: