diff --git a/cloudtools/start.py b/cloudtools/start.py
index 871a6e8c2e6..c9f29e65020 100644
--- a/cloudtools/start.py
+++ b/cloudtools/start.py
@@ -1,6 +1,6 @@
 from subprocess import call, check_output
 
-COMPATIBILITY_VERSION = 2
+COMPATIBILITY_VERSION = 3
 
 # master machine type to memory map, used for setting spark.driver.memory property
 machine_mem = {