diff --git a/examples/lock-app/qpg/src/AppTask.cpp b/examples/lock-app/qpg/src/AppTask.cpp
index 3428752d0d5f78..451f39a38bd82a 100644
--- a/examples/lock-app/qpg/src/AppTask.cpp
+++ b/examples/lock-app/qpg/src/AppTask.cpp
@@ -51,7 +51,7 @@ using namespace chip::DeviceLayer;
 
 #define FACTORY_RESET_TRIGGER_TIMEOUT 3000
 #define FACTORY_RESET_CANCEL_WINDOW_TIMEOUT 3000
-#define APP_TASK_STACK_SIZE (2048)
+#define APP_TASK_STACK_SIZE (3072)
 #define APP_TASK_PRIORITY 2
 #define APP_EVENT_QUEUE_SIZE 10