diff --git a/scio-snowflake/src/main/scala/com/spotify/scio/snowflake/SnowflakeOptions.scala b/scio-snowflake/src/main/scala/com/spotify/scio/snowflake/SnowflakeOptions.scala
index 4ee8aaaefb..a43fb74fe9 100644
--- a/scio-snowflake/src/main/scala/com/spotify/scio/snowflake/SnowflakeOptions.scala
+++ b/scio-snowflake/src/main/scala/com/spotify/scio/snowflake/SnowflakeOptions.scala
@@ -17,7 +17,7 @@
 
 package com.spotify.scio.snowflake
 
-trait SnowflakeAuthenticationOptions
+sealed trait SnowflakeAuthenticationOptions
 
 /**
  * Options for a Snowflake username/password authentication.