diff --git a/root/etc/cont-init.d/30-config b/root/etc/cont-init.d/30-config
index 799ace0..d5e4e8b 100644
--- a/root/etc/cont-init.d/30-config
+++ b/root/etc/cont-init.d/30-config
@@ -11,3 +11,6 @@ mkdir -p \
 # permissions
 chown -R abc:abc \
 	/config
+
+chmod a+rw /dev/ttyUSB*
+