diff --git a/.drone.yml b/.drone.yml
index 55272c7..d1f2138 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -15,6 +15,14 @@ steps:
   - apk add --no-cache -X http://dl-cdn.alpinelinux.org/alpine/edge/testing helm
   - helm lint
 
+- name: helm template
+  pull: always
+  image: alpine:3.13
+  commands:
+  - apk add --no-cache -X http://dl-cdn.alpinelinux.org/alpine/edge/testing helm
+  - helm dependency update
+  - helm template --debug gitea-helm .
+
 - name: markdown lint
   pull: always
   image: docker.io/volkerraschek/markdownlint:latest
diff --git a/templates/gitea/deprecation.yaml b/templates/gitea/deprecation.yaml
new file mode 100644
index 0000000..057c5bd
--- /dev/null
+++ b/templates/gitea/deprecation.yaml
@@ -0,0 +1,34 @@
+{{- if .Values.checkDeprecation -}}
+  {{/* CUSTOM PROBES */}}
+  {{- if .Values.gitea.customLivenessProbe -}}
+    {{- fail "`gitea.customLivenessProbe` does no longer exist. Please refer to the changelog and configure `gitea.livenessProbe` instead." -}}
+  {{- end -}}
+  {{- if .Values.gitea.customReadinessProbe -}}
+    {{- fail "`gitea.customReadinessProbe` does no longer exist. Please refer to the changelog and configure `gitea.readinessProbe` instead." -}}
+  {{- end -}}
+  {{- if .Values.gitea.customStartupProbe -}}
+    {{- fail "`gitea.customStartupProbe` does no longer exist. Please refer to the changelog and configure `gitea.startupProbe` instead." -}}
+  {{- end -}}
+
+  {{/* LDAP SOURCES */}}
+  {{- if kindIs "map" .Values.gitea.ldap -}}
+    {{- fail "You can configure multiple LDAP sources. Please refer to the changelog and switch `gitea.ldap` from object to array notation." -}}
+  {{- end -}}
+  
+  {{/* OAUTH SOURCES */}}
+  {{- if kindIs "map" .Values.gitea.oauth -}}
+    {{- fail "You can configure multiple OAuth sources. Please refer to the changelog and switch `gitea.oauth` from object to array notation." -}}
+  {{- end -}}
+  
+  {{/* BUILTIN */}}
+  {{- if .Values.gitea.cache -}}
+    {{- if .Values.gitea.cache.builtIn -}}
+      {{- fail "`gitea.cache.builtIn` does no longer exist. Please use `memcached` at root level instead." -}}
+    {{- end -}}
+  {{- end -}}
+  {{- if .Values.gitea.database -}}
+    {{- if .Values.gitea.database.builtIn -}}
+      {{- fail "`gitea.database.builtIn` does no longer exist. Builtin databases can be configured inside the dependencies itself. Please refer to the changelog." -}}
+    {{- end -}}
+  {{- end -}}
+{{- end -}}
diff --git a/values.yaml b/values.yaml
index 11cc183..18a8f20 100644
--- a/values.yaml
+++ b/values.yaml
@@ -284,3 +284,7 @@ mariadb:
       port: 3306
     persistence:
       size: 10Gi
+
+# By default, removed or moved settings that still remain in a user defined values.yaml will cause Helm to fail running the install/update.
+# Set it to false to skip this basic validation check.
+checkDeprecation: true