diff --git a/app.py b/app.py
index 8711da4..fac86ae 100644
--- a/app.py
+++ b/app.py
@@ -123,7 +123,7 @@ def calculate_statistics(user_input, current_text):
         'correct_chars': correct_chars,
         'incorrect_chars': incorrect_chars,
         'total_chars': total_chars,
-        'error_rate': round(error_rate, 2),
+        'error_rate': round(error_rate, 1),  # Nur eine Dezimalstelle
         'typing_speed': round(typing_speed, 2),
         'duration_per_char': round(duration_per_char, 3),
         'words_per_minute': round(words_per_minute, 2)