diff --git a/.drone.yml b/.drone.yml
index 19921cd60..b59b6e9c4 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -40,10 +40,19 @@ pipeline:
 
   slack:
     image: plugins/slack
-    secrets: [ slack_webhook ]
     template: >
       {{#success build.status}}
         build {{build.number}} succeeded. Good job.
       {{else}}
         build {{build.number}} failed. Fix me please.
-      {{/success}}
\ No newline at end of file
+      {{/success}}
+    secrets: [ slack_webhook ]
+    when:
+      status: [ failure, success ]
+	
+  cleanup:
+    commands:
+      - docker system prune -f
+    when:
+      status: failure
+    	  
\ No newline at end of file
diff --git a/src/Squidex.Infrastructure/TypeNameRegistry.cs b/src/Squidex.Infrastructure/TypeNameRegistry.cs
index 77d4b5edf..b08259a04 100644
--- a/src/Squidex.Infrastructure/TypeNameRegistry.cs
+++ b/src/Squidex.Infrastructure/TypeNameRegistry.cs
@@ -78,7 +78,7 @@ namespace Squidex.Infrastructure
             {
                 var typeNameAttribute = type.GetTypeInfo().GetCustomAttribute<TypeNameAttribute>();
 
-                if (typeNameAttribute != null && !string.IsNullOrWhiteSpace(typeNameAttribute.TypeName))
+                if (!string.IsNullOrWhiteSpace(typeNameAttribute?.TypeName))
                 {
                     Map(type, typeNameAttribute.TypeName);
                 }