diff --git a/tools/ci/after_failure.sh b/tools/ci/after_failure.sh
old mode 100644
new mode 100755
index 99243ce5bfd..927ecdb7eb3
--- a/tools/ci/after_failure.sh
+++ b/tools/ci/after_failure.sh
@@ -1,3 +1,4 @@
+#!/bin/bash
 set -v
 
 echo "Errors and warnings in log files"
diff --git a/tools/ci/before_install.sh b/tools/ci/before_install.sh
old mode 100644
new mode 100755
index 6ee40e39c4e..486924242c7
--- a/tools/ci/before_install.sh
+++ b/tools/ci/before_install.sh
@@ -1,3 +1,4 @@
+#!/bin/bash
 set -v
 
 source $TRAVIS_BUILD_DIR/tools/ci/setup_vmdb_configs.sh
diff --git a/tools/ci/setup_ruby_env.sh b/tools/ci/setup_ruby_env.sh
old mode 100644
new mode 100755
index e763ff94458..e4682b12fb4
--- a/tools/ci/setup_ruby_env.sh
+++ b/tools/ci/setup_ruby_env.sh
@@ -1,3 +1,4 @@
+#!/bin/bash
 ./tools/ci/setup_ruby_environment.rb
 export BUNDLE_WITHOUT=development
 export BUNDLE_GEMFILE=${PWD}/Gemfile
diff --git a/tools/ci/setup_vmdb_configs.sh b/tools/ci/setup_vmdb_configs.sh
old mode 100644
new mode 100755