diff --git a/Jenkinsfile b/Jenkinsfile
index e8379f298..425ff936e 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -45,7 +45,7 @@ pipeline {
     stages {
         stage('Initial setup') {
             steps {
-                sh '''
+                sh '''#!/bin/bash
                     source "ci/functions.sh"
                     set_label_flags
 
@@ -90,7 +90,7 @@ pipeline {
             steps {
                 script {
                     withVault([configuration: configuration, vaultSecrets: secrets]) {
-                        sh '''
+                        sh '''#!/bin/bash
                             curl -sSL "$CICD_INSTALL_SCRIPT" > .cicd_install_script && source ./.cicd_install_script && rm ./.cicd_install_script
                             export DOCKER_BUILDKIT=1
                             source $CICD_ROOT/build.sh
@@ -110,7 +110,7 @@ pipeline {
             steps {
                 script {
                     withVault([configuration: configuration, vaultSecrets: secrets]) {
-                        sh '''
+                        sh '''#!/bin/bash
                             curl -sSL "$CICD_INSTALL_SCRIPT" > .cicd_install_script && source ./.cicd_install_script && rm ./.cicd_install_script
                             RELEASE_NAMESPACE="false"
                             source $CICD_ROOT/deploy_ephemeral_env.sh
@@ -133,7 +133,7 @@ pipeline {
             }
             steps {
                 withVault([configuration: configuration, vaultSecrets: secrets]) {
-                    sh '''
+                    sh '''#!/bin/bash
                         mkdir -p "$ARTIFACTS_DIR"
                         source ./ci/functions.sh
                         set +e