diff --git a/bootloader b/bootloader
index fc6e61e..b09d69b 160000
--- a/bootloader
+++ b/bootloader
@@ -1 +1 @@
-Subproject commit fc6e61eeada07c36b00c99f18f74c26b95b36ddb
+Subproject commit b09d69b42eadddaa698af06d8bfef11a176ea173
diff --git a/build_firmware.sh b/build_firmware.sh
index 95cecce..7a889bb 100755
--- a/build_firmware.sh
+++ b/build_firmware.sh
@@ -1,4 +1,7 @@
 #!/bin/bash
+
+set -eu
+
 INFO="\e[1;36m"
 ENDCOLOR="\e[0m"
 
@@ -64,4 +67,4 @@ cat sha256.txt
 
 echo "
 Hashes saved to release/sha256.txt file.
-"
\ No newline at end of file
+"