diff --git a/chapter1/1.4Windows+Pycharm搭建Python版Spark开发环境.md b/chapter1/1.4Windows+Pycharm搭建Python版Spark开发环境.md
index e150eb3..b1f4a0f 100644
--- a/chapter1/1.4Windows+Pycharm搭建Python版Spark开发环境.md
+++ b/chapter1/1.4Windows+Pycharm搭建Python版Spark开发环境.md
@@ -146,6 +146,7 @@ from pyspark.sql import SparkSession
 
 spark = SparkSession \
     .builder \
+    .master("local")\
     .appName("Python Spark SQL basic example") \
     .config("spark.some.config.option", "some-value") \
     .getOrCreate()