diff --git a/Web/app.py b/Web/app.py
index 2ab389e..84da23e 100644
--- a/Web/app.py
+++ b/Web/app.py
@@ -2,6 +2,7 @@
 from flask import Flask, request, render_template
 import os
 import subprocess
+import re
 
 app = Flask(__name__)
 
@@ -12,6 +13,7 @@ def my_form():
 @app.route('/', methods=['POST'])
 def form_post():
     text = request.form['secret']
+    text = re.sub (r'([^a-zA-Z]+?)', '', text) # Remove all non-letters.
     command = "python3 Caeser-Cipher/Caeser-Cipher.py encrypt " + str(text) + " 3"
     ciphered_text = subprocess.check_output(command, shell=True)
     return ciphered_text