diff --git a/pluginserver.go b/pluginserver.go
index d2b2c7d..bd4753d 100644
--- a/pluginserver.go
+++ b/pluginserver.go
@@ -174,7 +174,7 @@ func getSchemaDict(t reflect.Type) schemaDict {
 	case reflect.Float32, reflect.Float64:
 		return schemaDict{"type": "number"}
 
-	case reflect.Array:
+	case reflect.Slice:
 		elemType := getSchemaDict(t.Elem())
 		if elemType == nil {
 			break