diff --git a/.gitignore b/.gitignore
index 5dcc104..fb2a675 100644
--- a/.gitignore
+++ b/.gitignore
@@ -444,3 +444,6 @@ obj/
 
 # End of https://www.toptal.com/developers/gitignore/api/platformio,c,cmake,c++,intellij,android,androidstudio,clion+all,java
 
+
+### only on app_dev
+firmware/