diff --git a/samples/subsys/lorawan/class_a/prj.conf b/samples/subsys/lorawan/class_a/prj.conf
index ec54d78f51..749a5e74fc 100644
--- a/samples/subsys/lorawan/class_a/prj.conf
+++ b/samples/subsys/lorawan/class_a/prj.conf
@@ -5,3 +5,5 @@ CONFIG_LORA=y
 CONFIG_LORA_SX12XX=y
 CONFIG_LORAWAN=y
 CONFIG_LORAMAC_REGION_IN865=y
+CONFIG_MAIN_STACK_SIZE=2048
+CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048