diff --git a/source/jmap/types.d b/source/jmap/types.d
index 5cea4d4..b2ab2c9 100644
--- a/source/jmap/types.d
+++ b/source/jmap/types.d
@@ -94,6 +94,7 @@ struct Account {
     StringMap!string primaryAccounts;
 }
 
+@serdeIgnoreUnexpectedKeys
 struct Session {
     @serdeOptional
     SessionCoreCapabilities coreCapabilities;