diff --git a/.ci/build_image b/.ci/build_image
index 76e340ea1a868f7d0ae541fd852c0febdec33b6e..b49b9431285738e9acde03a9c75d485cab586fc4 100755
--- a/.ci/build_image
+++ b/.ci/build_image
@@ -1,6 +1,6 @@
-#!/usr/bin/env bash
+#!/bin/sh
 
-set -x -e -o pipefail
+set -e -x
 
 source gen_image_tags
 
diff --git a/.ci/gen_image_tags b/.ci/gen_image_tags
index e4910788d1a328701c30eec7bc076e909de82039..6f91502d17ddf2ce3c3dd354b888a78538a369fd 100755
--- a/.ci/gen_image_tags
+++ b/.ci/gen_image_tags
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 
 export SHORTLINKS_PROJECT_PATH=$(echo $CI_PROJECT_PATH | awk '{print tolower($0)}')
 export SHORTLINKS_IMAGE_NAME=registry.gitlab.com/$SHORTLINKS_PROJECT_PATH
diff --git a/.ci/login_registry b/.ci/login_registry
index 6b74707a23ce8f56fa95414ae0a8b3864cc1b3aa..428231865b46d7cb95ee6e88a2dbf00d2d77336c 100755
--- a/.ci/login_registry
+++ b/.ci/login_registry
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 
 docker login \
        -u gitlab-ci-token \
diff --git a/.ci/release_image b/.ci/release_image
index 429a3dfded821565403daee87488c1577ba40508..fbd3bdb50c6c5f6fd20c1c68ffe12ec2d3ceb90d 100755
--- a/.ci/release_image
+++ b/.ci/release_image
@@ -1,6 +1,6 @@
-#!/usr/bin/env bash
+#!/bin/sh
 
-set -x -e -o pipefail
+set -e -x
 
 source gen_image_tags
 
diff --git a/.ci/test_lint b/.ci/test_lint
index ea388c00acce96d93b814e4d199f70423402ded3..071ee7ddf8b3facb4bee17d6a6d39a221de1081d 100755
--- a/.ci/test_lint
+++ b/.ci/test_lint
@@ -1,6 +1,6 @@
-#!/usr/bin/env bash
+#!/bin/sh
 
-set -e -x -o pipefail
+set -e -x
 
 pip install coala-bears
 
diff --git a/.ci/test_template_sync b/.ci/test_template_sync
index 57515a6be66046d8b3bec3ff10947a2a759fb6dc..0f7604c25150fa219cd71b4b7ec365e6745bbbc8 100755
--- a/.ci/test_template_sync
+++ b/.ci/test_template_sync
@@ -1,6 +1,6 @@
-#!/usr/bin/env bash
+#!/bin/sh
 
-set -e -x -o pipefail
+set -e -x
 
 apk add --no-cache git
 
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index d06bbc0dd23b2d811b7930539f12a17271f13174..1144c2a000515b1bb1b25f3fd1393cf1f06787e8 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -7,7 +7,6 @@ stages:
 
 before_script:
   - export PATH=$(pwd)/.ci:$PATH
-  - apk add --no-cache bash
 
 .docker_env: &docker_env
   image: docker:stable