diff --git a/Software/prepare_littlefs.py b/Software/prepare_littlefs.py
index 44c9a3f..7e5e716 100644
--- a/Software/prepare_littlefs.py
+++ b/Software/prepare_littlefs.py
@@ -24,7 +24,7 @@ def minify_js(input_path, output_path):
     subprocess.run([terser_path, input_path, '-o', output_path, '-c', '-m'])
 
 def minify_css(input_path, output_path):
-    subprocess.run([cssnano_path, input_path, output_path])
+    subprocess.run([cssnano_path, '--no-discardUnused', input_path, output_path])
 
 def process_file(src_path, dest_path):
     _, file_extension = os.path.splitext(src_path)