diff --git a/CHANGELOG.md b/CHANGELOG.md
index ca5225be..61e83cb6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@ All notable changes to the Databricks Labs Data Generator will be documented in
 * Fixed use of logger in _version.py and in spark_singleton.py
 * Fixed template issues 
 * Added use of prospector to build process to validate common code issues
+* Apply pandas optimizations when generating multiple columns using same `withColumn` or `withColumnSpec`
 
 ### Version 0.3.2