diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3dfe35a4..18a74a8e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,8 @@ HEAD
   (No need to define `ARDUINOJSON_ENABLE_STD_STRING` and `ARDUINOJSON_ENABLE_STD_STREAM` anymore)
 * Improved decoding of UTF-16 surrogate pairs (PR #1157 by @kaysievers)
   (ArduinoJson now produces standard UTF-8 instead of CESU-8)
+* Added `measureJson`, `measureJsonPretty`, and `measureMsgPack` to `keywords.txt`
+  (This file is used for syntax highlighting in the Arduino IDE) 
 
 > ### BREAKING CHANGES
 > 
diff --git a/keywords.txt b/keywords.txt
index 7dc2b807..a0c8d381 100644
--- a/keywords.txt
+++ b/keywords.txt
@@ -10,6 +10,9 @@ serialized	KEYWORD2
 serializeJson	KEYWORD2
 serializeJsonPretty	KEYWORD2
 serializeMsgPack	KEYWORD2
+measureJson	KEYWORD2
+measureJsonPretty	KEYWORD2
+measureMsgPack	KEYWORD2
 
 # Methods
 add	KEYWORD2