diff --git a/04-machine_learning/02-sparkml_examples/04-spark_CTRmodel/pom.xml b/04-machine_learning/02-sparkml_examples/04-spark_CTRmodel/pom.xml
old mode 100755
new mode 100644
index 3184035f..6bded0f0
--- a/04-machine_learning/02-sparkml_examples/04-spark_CTRmodel/pom.xml
+++ b/04-machine_learning/02-sparkml_examples/04-spark_CTRmodel/pom.xml
@@ -9,7 +9,7 @@
     <version>1.0-SNAPSHOT</version>
 
     <properties>
-        <spark.version>2.3.2</spark.version>
+        <spark.version>2.4.7</spark.version>
         <scala.version>2.11</scala.version>
         <maven.compiler.source>1.8</maven.compiler.source>
         <maven.compiler.target>1.8</maven.compiler.target>