diff --git a/tools/build-libs.sh b/tools/build-libs.sh
index 33d5daaa3..49a668826 100755
--- a/tools/build-libs.sh
+++ b/tools/build-libs.sh
@@ -1,4 +1,4 @@
-#/bin/bash
+#!/bin/bash
 
 #remove previous build
 rm -rf ./out ./build
diff --git a/tools/install-esp-idf.sh b/tools/install-esp-idf.sh
index ad62e7155..9b625d0ab 100755
--- a/tools/install-esp-idf.sh
+++ b/tools/install-esp-idf.sh
@@ -1,4 +1,4 @@
-#/bin/bash
+#!/bin/bash
 
 source ./tools/config.sh
 
diff --git a/tools/update-components.sh b/tools/update-components.sh
index 7cae8c15e..52c5b6f65 100755
--- a/tools/update-components.sh
+++ b/tools/update-components.sh
@@ -1,4 +1,4 @@
-#/bin/bash
+#!/bin/bash
 
 source ./tools/config.sh