diff --git a/update-css.sh b/update-css.sh
index 76bf911..f30ca99 100755
--- a/update-css.sh
+++ b/update-css.sh
@@ -3,31 +3,12 @@
 # get the directory in which this script is located (the theme source dir)
 SOURCE_DIR=$(cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd)
 
-TAILWINDCSS_COMMAND="tailwindcss -i src/css/main.css -o static/css/main.css --minify"
-UGLIFYJS_COMMAND="uglifyjs"
-
-# call the tailwindcss cli executable, if it can be found in the path
-if command -v tailwindcss >/dev/null; then
-    pushd "${SOURCE_DIR}" >/dev/null
-    ${TAILWINDCSS_COMMAND}
-    popd >/dev/null
-
-# alternatively use docker to create and run a container and execute tailwinds cli from there
-elif command -v docker >/dev/null; then
-
-    # create the container for zola builds and tailwindcss updates
-    docker build -t develop-zola-tailwindcss "${SOURCE_DIR}" || exit 2
-
-    # update the CSS file using tailwindcss
-    docker run --user $UID:$(id -g) --mount type=bind,source=${SOURCE_DIR},target=/source -w /source develop-zola-tailwindcss \
-        sh -c "uglifyjs ./src/js/main.js --compress --mangle -o ./static/js/main.js &&
-               uglifyjs ./src/js/page.js --compress --mangle -o ./static/js/page.js &&
-               uglifyjs ./src/js/search.js --compress --mangle -o ./static/js/search.js &&
-               ${TAILWINDCSS_COMMAND}" || exit 3
-
-
-# print an error message if neither tailwindcss nor the docker executable could be found
-else
-    echo "Need either 'tailwindcss' or 'docker' executable in the path." >&2
-    exit 1
-fi
+# create the container for zola builds and tailwindcss updates
+docker build -t develop-zola-tailwindcss "${SOURCE_DIR}" || exit 2
+
+# update the CSS file using tailwindcss and the JavaScript files using uglifyjs
+docker run -v ${SOURCE_DIR}:/source:Z -w /source develop-zola-tailwindcss \
+    sh -c "uglifyjs ./src/js/main.js --compress --mangle -o ./static/js/main.js &&
+           uglifyjs ./src/js/page.js --compress --mangle -o ./static/js/page.js &&
+           uglifyjs ./src/js/search.js --compress --mangle -o ./static/js/search.js &&
+           tailwindcss -i src/css/main.css -o static/css/main.css --minify" || exit 3