diff --git a/util/copy-languages.js b/util/copy-languages.js
deleted file mode 100644
index 7eb53b87..00000000
--- a/util/copy-languages.js
+++ /dev/null
@@ -1,10 +0,0 @@
-const fs = require('fs');
-
-const langs = ['de-DE', 'fr-FR'];
-
-for (const lang of langs) {
-    fs.writeFileSync(
-        `app/scripts/locales/${lang}.json`,
-        fs.readFileSync(`../keeweb-plugins/docs/translations/${lang}/${lang}.json`)
-    );
-}
diff --git a/util/copy-languages.sh b/util/copy-languages.sh
new file mode 100755
index 00000000..9f7f3e7d
--- /dev/null
+++ b/util/copy-languages.sh
@@ -0,0 +1,4 @@
+#!/bin/sh
+
+cp ../keeweb-plugins/docs/translations/de-DE/de-DE.json app/scripts/locales/de-DE.json
+cp ../keeweb-plugins/docs/translations/fr-FR/fr-FR.json app/scripts/locales/fr-FR.json
diff --git a/util/prettier.sh b/util/prettier.sh
index 48065c5e..4e3e4c48 100755
--- a/util/prettier.sh
+++ b/util/prettier.sh
@@ -1,3 +1,5 @@
+#!/bin/sh
+
 ./node_modules/.bin/prettier --write \
   'app/**/*.js' \
   'app/**/*.scss' \