diff --git a/samples/boards/microbit/pong/prj.conf b/samples/boards/microbit/pong/prj.conf
index 4744d12b231..378cce523bb 100644
--- a/samples/boards/microbit/pong/prj.conf
+++ b/samples/boards/microbit/pong/prj.conf
@@ -1,3 +1,4 @@
+CONFIG_ISR_STACK_SIZE=1024
 CONFIG_BLUETOOTH=y
 CONFIG_BLUETOOTH_CENTRAL=y
 CONFIG_BLUETOOTH_PERIPHERAL=y