diff --git a/docs/kubernetes/mailu/admin.yaml b/docs/kubernetes/mailu/admin.yaml
index 435b7975..08c06e44 100644
--- a/docs/kubernetes/mailu/admin.yaml
+++ b/docs/kubernetes/mailu/admin.yaml
@@ -1,4 +1,4 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: mailu-admin
@@ -60,4 +60,4 @@ spec:
   ports:
   - name: http
     port: 80
-    protocol: TCP
\ No newline at end of file
+    protocol: TCP
diff --git a/docs/kubernetes/mailu/fetchmail.yaml b/docs/kubernetes/mailu/fetchmail.yaml
index cf3271e7..d454f95b 100644
--- a/docs/kubernetes/mailu/fetchmail.yaml
+++ b/docs/kubernetes/mailu/fetchmail.yaml
@@ -1,4 +1,4 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: mailu-fetchmail
@@ -36,4 +36,4 @@ spec:
       volumes:
         - name: maildata
           persistentVolumeClaim:
-            claimName: mail-storage
\ No newline at end of file
+            claimName: mail-storage
diff --git a/docs/kubernetes/mailu/imap.yaml b/docs/kubernetes/mailu/imap.yaml
index b70d5330..c3a188c7 100644
--- a/docs/kubernetes/mailu/imap.yaml
+++ b/docs/kubernetes/mailu/imap.yaml
@@ -1,4 +1,4 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: mailu-imap
diff --git a/docs/kubernetes/mailu/ingress.yaml b/docs/kubernetes/mailu/ingress.yaml
index 85b4375d..5a941e97 100644
--- a/docs/kubernetes/mailu/ingress.yaml
+++ b/docs/kubernetes/mailu/ingress.yaml
@@ -1,4 +1,4 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Ingress
 metadata:
   name: mailu-ingress
diff --git a/docs/kubernetes/mailu/redis.yaml b/docs/kubernetes/mailu/redis.yaml
index d6bb1eb8..98471492 100644
--- a/docs/kubernetes/mailu/redis.yaml
+++ b/docs/kubernetes/mailu/redis.yaml
@@ -1,4 +1,4 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: mailu-redis
@@ -53,4 +53,4 @@ spec:
   ports:
   - name: redis
     port: 6379
-    protocol: TCP
\ No newline at end of file
+    protocol: TCP
diff --git a/docs/kubernetes/mailu/security.yaml b/docs/kubernetes/mailu/security.yaml
index 80fde812..419c7ac4 100644
--- a/docs/kubernetes/mailu/security.yaml
+++ b/docs/kubernetes/mailu/security.yaml
@@ -1,5 +1,4 @@
-
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: mailu-security
@@ -113,4 +112,4 @@ spec:
   ports:
   - name: antivirus
     port: 3310
-    protocol: TCP
\ No newline at end of file
+    protocol: TCP
diff --git a/docs/kubernetes/mailu/smtp.yaml b/docs/kubernetes/mailu/smtp.yaml
index 248cf1f2..6002d508 100644
--- a/docs/kubernetes/mailu/smtp.yaml
+++ b/docs/kubernetes/mailu/smtp.yaml
@@ -1,4 +1,4 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: mailu-smtp
diff --git a/docs/kubernetes/mailu/webdav.yaml b/docs/kubernetes/mailu/webdav.yaml
index 07b7733c..57dde9a9 100644
--- a/docs/kubernetes/mailu/webdav.yaml
+++ b/docs/kubernetes/mailu/webdav.yaml
@@ -1,4 +1,4 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: mailu-webdav
@@ -60,4 +60,4 @@ spec:
     protocol: TCP
   - name: http-ui
     port: 5232
-    protocol: TCP
\ No newline at end of file
+    protocol: TCP
diff --git a/docs/kubernetes/mailu/webmail.yaml b/docs/kubernetes/mailu/webmail.yaml
index bbbeb09d..e93121c7 100644
--- a/docs/kubernetes/mailu/webmail.yaml
+++ b/docs/kubernetes/mailu/webmail.yaml
@@ -1,5 +1,4 @@
-
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: mailu-roundcube
diff --git a/docs/kubernetes/nginx/default-http-backend.yaml b/docs/kubernetes/nginx/default-http-backend.yaml
index 097fe7c5..cf881c53 100644
--- a/docs/kubernetes/nginx/default-http-backend.yaml
+++ b/docs/kubernetes/nginx/default-http-backend.yaml
@@ -1,4 +1,4 @@
-apiVersion: extensions/v1beta1
+apiVersion: apps/v1
 kind: Deployment
 metadata:
   name: default-http-backend
@@ -52,4 +52,4 @@ spec:
   - port: 80
     targetPort: 8080
   selector:
-    app: default-http-backend
\ No newline at end of file
+    app: default-http-backend