diff --git a/Chapter04/requirements.txt b/Chapter04/requirements.txt
index 65192a6..4c4837a 100644
--- a/Chapter04/requirements.txt
+++ b/Chapter04/requirements.txt
@@ -3,5 +3,5 @@ azureml-dataprep==1.4.3
 pandas==0.23.4
 numpy==1.16.2
 scikit-learn==0.20.3
-pyspark==2.4.3
+pyspark==3.2.2
 pyarrow==0.17.0
\ No newline at end of file