diff --git a/userspace/falco/outputs.proto b/userspace/falco/outputs.proto
index 663168af..b2d35adc 100644
--- a/userspace/falco/outputs.proto
+++ b/userspace/falco/outputs.proto
@@ -45,10 +45,11 @@ message request {
 message response {
   google.protobuf.Timestamp time = 1;
   falco.schema.priority priority = 2;
-  falco.schema.source source = 3;
+  falco.schema.source source_deprecated = 3 [deprecated=true];
   string rule = 4;
   string output = 5;
   map<string, string> output_fields = 6;
   string hostname = 7;
   repeated string tags = 8;
+  string source = 9;
 }
\ No newline at end of file
diff --git a/userspace/falco/schema.proto b/userspace/falco/schema.proto
index 18b5ef3f..7707e314 100644
--- a/userspace/falco/schema.proto
+++ b/userspace/falco/schema.proto
@@ -60,4 +60,7 @@ enum source {
   INTERNAL = 2;
   internal = 2;
   Internal = 2;
+  PLUGIN = 3;
+  plugin = 3;
+  Plugin = 3;
 }