diff --git a/firmware/config/stm32f4ems/efifeatures.h b/firmware/config/stm32f4ems/efifeatures.h
index 2199b15d22..924e8167be 100644
--- a/firmware/config/stm32f4ems/efifeatures.h
+++ b/firmware/config/stm32f4ems/efifeatures.h
@@ -270,7 +270,7 @@
 	// small memory F40x can't fit perf trace
 	#define ENABLE_PERF_TRACE FALSE
 
-	#define LUA_USER_HEAP 12000
+	#define LUA_USER_HEAP 13000
 	#define LUA_SYSTEM_HEAP 12000
 #endif