diff --git a/seichi-onp-k8s/manifests/seichi-kubernetes/app-templates/seichi-debug-minecraft-on-seichiassist-pr/templates/mariadb/mariadb.yaml b/seichi-onp-k8s/manifests/seichi-kubernetes/app-templates/seichi-debug-minecraft-on-seichiassist-pr/templates/mariadb/mariadb.yaml
index b5bdcb43d..b1371aa8d 100644
--- a/seichi-onp-k8s/manifests/seichi-kubernetes/app-templates/seichi-debug-minecraft-on-seichiassist-pr/templates/mariadb/mariadb.yaml
+++ b/seichi-onp-k8s/manifests/seichi-kubernetes/app-templates/seichi-debug-minecraft-on-seichiassist-pr/templates/mariadb/mariadb.yaml
@@ -21,7 +21,7 @@ spec:
     spec:
       containers:
       - name: mariadb
-        image: mariadb:10.11.8
+        image: mariadb:10.11.9
         imagePullPolicy: IfNotPresent
         resources:
           requests:
@@ -76,7 +76,7 @@ spec:
           mountPath: /etc/mysql/conf.d
       initContainers:
       - name: init-0
-        image: mariadb:10.11.8
+        image: mariadb:10.11.9
         imagePullPolicy: IfNotPresent
         resources:
           requests:
diff --git a/seichi-onp-k8s/manifests/seichi-kubernetes/apps/seichi-debug-minecraft/mariadb/mariadb.yaml b/seichi-onp-k8s/manifests/seichi-kubernetes/apps/seichi-debug-minecraft/mariadb/mariadb.yaml
index 8604fece5..3510560e7 100644
--- a/seichi-onp-k8s/manifests/seichi-kubernetes/apps/seichi-debug-minecraft/mariadb/mariadb.yaml
+++ b/seichi-onp-k8s/manifests/seichi-kubernetes/apps/seichi-debug-minecraft/mariadb/mariadb.yaml
@@ -16,7 +16,7 @@ spec:
     generate: false
     key: mcserver-password
 
-  image: mariadb:10.11.8
+  image: mariadb:10.11.9
   imagePullPolicy: IfNotPresent
 
   port: 3306
diff --git a/seichi-onp-k8s/manifests/seichi-kubernetes/apps/seichi-minecraft/mariadb/mariadb.yaml b/seichi-onp-k8s/manifests/seichi-kubernetes/apps/seichi-minecraft/mariadb/mariadb.yaml
index eef1d842a..56a60d3ed 100644
--- a/seichi-onp-k8s/manifests/seichi-kubernetes/apps/seichi-minecraft/mariadb/mariadb.yaml
+++ b/seichi-onp-k8s/manifests/seichi-kubernetes/apps/seichi-minecraft/mariadb/mariadb.yaml
@@ -16,7 +16,7 @@ spec:
     generate: false
     key: mcserver-password
 
-  image: mariadb:10.11.8
+  image: mariadb:10.11.9
   imagePullPolicy: IfNotPresent
 
   port: 3306