Update app.py

app.py

@@ -91,7 +91,7 @@ def process_sequence(sequence, domain_bounds, n):
 
     # Save the figure to a BytesIO object
     buf = BytesIO()
-    plt.savefig(buf, format='png', dpi = 300)
+    plt.savefig(buf, format='png', dpi=(300, 300))
     buf.seek(0)
     plt.close()