diff --git a/keywords.txt b/keywords.txt
index a0c8d381..3dff06bf 100644
--- a/keywords.txt
+++ b/keywords.txt
@@ -28,6 +28,7 @@ DeserializationError	KEYWORD1	DATA_TYPE
 DynamicJsonDocument	KEYWORD1	DATA_TYPE
 JsonArray	KEYWORD1	DATA_TYPE
 JsonArrayConst	KEYWORD1	DATA_TYPE
+JsonDocument	KEYWORD1	DATA_TYPE
 JsonFloat	KEYWORD1	DATA_TYPE
 JsonInteger	KEYWORD1	DATA_TYPE
 JsonObject	KEYWORD1	DATA_TYPE