diff --git a/web/bin/postbuild.sh b/web/bin/postbuild.sh
index dab5c6be73..e4bbc6af10 100755
--- a/web/bin/postbuild.sh
+++ b/web/bin/postbuild.sh
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 set -e
 
 # purgecss --css build/static/css/*.css --content build/index.html build/static/js/*.js --output build/static/css
diff --git a/web/bin/prebuild.sh b/web/bin/prebuild.sh
index 777c6f49de..50abeb35b3 100755
--- a/web/bin/prebuild.sh
+++ b/web/bin/prebuild.sh
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/bin/sh
 set -e
 
 babel scripts --out-dir tmp --extensions '.ts,.tsx'
diff --git a/web/package.json b/web/package.json
index 1454352d2c..640d97bf89 100644
--- a/web/package.json
+++ b/web/package.json
@@ -6,9 +6,9 @@
   },
   "scripts": {
     "dev": "react-scripts start",
-    "prebuild": "bash bin/prebuild.sh",
+    "prebuild": "sh bin/prebuild.sh",
     "build": "react-scripts build",
-    "postbuild": "bash bin/postbuild.sh",
+    "postbuild": "sh bin/postbuild.sh",
     "serve": "serve build --listen 3000",
     "analyze": "react-scripts build && source-map-explorer 'build/static/js/*.js'",
     "tsc": "tsc --noEmit",