diff --git a/src/main/kotlin/com/nylas/models/ConferencingProvider.kt b/src/main/kotlin/com/nylas/models/ConferencingProvider.kt
index 1b8d6988..2c62adc3 100644
--- a/src/main/kotlin/com/nylas/models/ConferencingProvider.kt
+++ b/src/main/kotlin/com/nylas/models/ConferencingProvider.kt
@@ -23,4 +23,7 @@ enum class ConferencingProvider {
 
   @Json(name = "skypeForConsumer")
   SKYPE_FOR_CONSUMER,
+
+  @Json(name = "unknown")
+  UNKNOWN,
 }