diff --git a/main.cfg.dist b/main.cfg.dist
index 8137962..e5cff94 100644
--- a/main.cfg.dist
+++ b/main.cfg.dist
@@ -11,3 +11,4 @@ AT_API_URL = "https://at.hackerspace.pl/api"
 
 OPEN_DAY_WEEKDAY = 4 # Thursday (according to %w of http://docs.python.org/2/library/time.html#time.strftime)
 OPEN_DAY_BEGIN_HOUR = 18
+SESSION_TYPE = filesystem
diff --git a/main.py b/main.py
index a91109f..a717ea0 100644
--- a/main.py
+++ b/main.py
@@ -6,12 +6,17 @@ import string
 import random
 import json
 from flask import Flask, render_template, request, flash, session, abort, jsonify, redirect
+from flask_session import Session
+from flask_session_captcha import FlaskSessionCaptcha
 from time import mktime, strftime
 from datetime import datetime
 
 app = Flask('main')
 app.config.from_pyfile('main.cfg')
 
+Session(app)
+captcha = FlaskSessionCaptcha(app)
+
 def pull_feed_entries():
     all_entries = []
     for tag, url in app.config['FEEDS']:
@@ -34,8 +39,9 @@ def mailman_subscribe(email, mailing_list):
     return True
 
 def parse_subscribe_requests():
-    flash(u"Subskrypcje tymczasowo wyłączone.", "error")
-    return
+    if not captcha.validate():
+        flash(u"Nie rozwiązano poprawnie CAPTCHA.", "error")
+        return
     if "email" in request.form:
         email = request.form["email"].strip()
         if len(email) > 0:
diff --git a/requirements.txt b/requirements.txt
index f04886c..ee1a7b2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,12 +1,16 @@
+captcha==0.3
 certifi==2019.3.9
 chardet==3.0.4
 Click==7.0
 feedparser==5.2.1
 Flask==1.0.2
+Flask-Session==0.3.1
+flask-session-captcha==1.1.0
 idna==2.8
 itsdangerous==1.1.0
 Jinja2==2.10
 MarkupSafe==1.1.1
+Pillow==5.4.1
 requests==2.21.0
 six==1.12.0
 urllib3==1.24.1
diff --git a/static/main.css b/static/main.css
index 26a55ea..cfda0e8 100644
--- a/static/main.css
+++ b/static/main.css
@@ -64,7 +64,7 @@ ul.news li {
 
 #about {
   border-bottom: 2px groove #fff;
-  padding: 5px;
+  padding: 15px;
 }
 
 #hs_branding {
@@ -97,12 +97,12 @@ span.author {
 
 #left {
   border-right: 2px groove #fff;
-  margin-right: 270px;
+  margin-right: 320px;
 }
 
 #right {
   position: absolute;
-  width: 250px;
+  width: 300px;
   top: 100px;
   padding-top: 16px;
   right: 0;
@@ -203,6 +203,26 @@ div.mail-desc {
   line-height: 15px;
 }
 
+div.mail-captcha {
+  width: 276px;
+  height: 40px;
+}
+div.mail-captcha img {
+  border: 1px groove #777;
+  width: 80px;
+  height: 30px;
+  float: left;
+}
+
+div.mail-captcha input {
+  float: left;
+  width: 178px !important;
+  height: 26px !important;
+  margin-top: 0 !important;
+  margin-bottom: 0 !important;
+  margin-right: 0 !important;
+}
+
 div.flashes {
   padding: 0;
   margin-left: auto;
@@ -228,4 +248,4 @@ div.flashes li {
 
 div.flashes li.error {
   background-color: #a01023;
-}
\ No newline at end of file
+}
diff --git a/templates/about.html b/templates/about.html
index 01b9819..6ae1ed1 100644
--- a/templates/about.html
+++ b/templates/about.html
@@ -66,21 +66,7 @@
       </ul>
   </div>
   <div id="right">
-    <form action="/about" method="post">
-      <input name=_csrf_token type=hidden value="{{ csrf_token() }}">
-      <h1 class="mail" style="text-align: center;">Listy mailingowe</h1>
-      <h2 style="text-align: center; margin-top: -6px;">Zapisz się i porozmawiaj</h2>
-      <h4><input name="mail-waw" type="checkbox" class="mailcheck" checked="true" />Warszawska</h4>
-      <div class="mail-desc">Główna lista dyskusyjna hackerspaceu - organizacja i rozwiązywanie problemów.</div>
-      <h4><input name="mail-proj" type="checkbox" class="mailcheck" checked="true"/>Warszawska Projektowa</h4>
-      <div class="mail-desc">Informacje o postępie projektów, pomysły, ogłaszanie sukcesów i porażek.</div>
-      <h4><input name="mail-offtopic" type="checkbox" class="mailcheck" />Off Topic</h4>
-      <div class="mail-desc">Dyskusja o wszystkim i o niczym. Niski stosunek sygnału do szumu.</div>
-      <center>
-        <input type="text" name="email" class="email-entry" placeholder="twoj@email.com" />
-        <input type="submit" value="Zapisz się" class="email-submit" />
-      </center>
-    </form>
+    {% include "subscribe.html" %}
     <h1 class="twitter">Twitter</h1>
     <script type="text/javascript">
     new TWTR.Widget({
diff --git a/templates/about_en.html b/templates/about_en.html
index 432e323..c968f2a 100644
--- a/templates/about_en.html
+++ b/templates/about_en.html
@@ -65,21 +65,7 @@
       </ul>
   </div>
   <div id="right">
-    <form action="/about" method="post">
-      <input name=_csrf_token type=hidden value="{{ csrf_token() }}">
-      <h1 class="mail" style="text-align: center;">Mailing lists</h1>
-      <h2 style="text-align: center; margin-top: -6px;">Subscribe and write</h2>
-      <h4><input name="mail-waw" type="checkbox" class="mailcheck" checked="true" />Warsaw</h4>
-      <div class="mail-desc">Main discussion list - organization and problem solving.</div>
-      <h4><input name="mail-proj" type="checkbox" class="mailcheck" checked="true"/>Warsaw Projects</h4>
-      <div class="mail-desc">Informations about our projects.</div>
-      <h4><input name="mail-offtopic" type="checkbox" class="mailcheck" />Off Topic</h4>
-      <div class="mail-desc">Discussions about everything and nothing. Low sound to noise ratio.</div>
-      <center>
-        <input type="text" name="email" class="email-entry" placeholder="your@email.com" />
-        <input type="submit" value="Subscribe" class="email-submit" />
-      </center>
-    </form>
+    {% include "subscribe_en.html" %}
     <h1 class="twitter">Twitter</h1>
     <script type="text/javascript">
     new TWTR.Widget({
diff --git a/templates/main.html b/templates/main.html
index f6d5218..536ffa7 100644
--- a/templates/main.html
+++ b/templates/main.html
@@ -39,21 +39,7 @@
   <iframe style="max-width: 750px;width:100%;border: none;" height="315" src="https://owncloud.hackerspace.pl/index.php/apps/calendar/embed/g8toktZrA9fyAHNi"></iframe>
   </div>
   <div id="right">
-    <form action="/" method="post">
-      <input name=_csrf_token type=hidden value="{{ csrf_token() }}">
-      <h1 class="mail" style="text-align: center;">Listy mailingowe</h1>
-      <h2 style="text-align: center; margin-top: -6px;">Zapisz się i porozmawiaj</h2>
-      <h4><input name="mail-waw" type="checkbox" class="mailcheck" checked>Warszawska</h4>
-      <div class="mail-desc">Główna lista dyskusyjna Warszawskiego Hackerspace'u - organizacja i rozwiązywanie problemów.</div>
-      <h4><input name="mail-proj" type="checkbox" class="mailcheck" checked/>Warszawska Projektowa</h4>
-      <div class="mail-desc">Informacje o postępie projektów, pomysły, ogłaszanie sukcesów i porażek.</div>
-      <h4><input name="mail-offtopic" type="checkbox" class="mailcheck" />Off Topic</h4>
-      <div class="mail-desc">Dyskusja o wszystkim i o niczym. Niski stosunek sygnału do szumu.</div>
-      <div style="text-align:center">
-        <input type="text" name="email" class="email-entry" placeholder="twoj@email.com" />
-        <input type="submit" value="Zapisz się" class="email-submit" />
-      </div>
-    </form>
+    {% include "subscribe.html" %}
     <h1 class="twitter">Twitter</h1>
     <script type="text/javascript">
     new TWTR.Widget({
diff --git a/templates/subscribe.html b/templates/subscribe.html
new file mode 100644
index 0000000..61ad4b0
--- /dev/null
+++ b/templates/subscribe.html
@@ -0,0 +1,19 @@
+<form action="/" method="post">
+  <input name=_csrf_token type=hidden value="{{ csrf_token() }}">
+  <h1 class="mail" style="text-align: center;">Listy mailingowe</h1>
+  <h2 style="text-align: center; margin-top: -6px;">Zapisz się i porozmawiaj</h2>
+  <h4><input name="mail-waw" type="checkbox" class="mailcheck" checked="true" />Warszawska</h4>
+  <div class="mail-desc">Główna lista dyskusyjna hackerspaceu - organizacja i rozwiązywanie problemów.</div>
+  <h4><input name="mail-proj" type="checkbox" class="mailcheck" checked="true"/>Warszawska Projektowa</h4>
+  <div class="mail-desc">Informacje o postępie projektów, pomysły, ogłaszanie sukcesów i porażek.</div>
+  <h4><input name="mail-offtopic" type="checkbox" class="mailcheck" />Off Topic</h4>
+  <div class="mail-desc">Dyskusja o wszystkim i o niczym. Niski stosunek sygnału do szumu.</div>
+  <center>
+    <input type="text" name="email" class="email-entry" placeholder="twoj@email.com" />
+    <div class="mail-captcha">
+        {{ captcha() }}
+        <input type="text" name="captcha" class="email-entry" placeholder="Przepisz CAPTCHA...">
+    </div>
+    <input type="submit" value="Zapisz się" class="email-submit" />
+  </center>
+</form>
diff --git a/templates/subscribe_en.html b/templates/subscribe_en.html
new file mode 100644
index 0000000..e8c352c
--- /dev/null
+++ b/templates/subscribe_en.html
@@ -0,0 +1,19 @@
+<form action="/" method="post">
+  <input name=_csrf_token type=hidden value="{{ csrf_token() }}">
+  <h1 class="mail" style="text-align: center;">Mailing lists</h1>
+  <h2 style="text-align: center; margin-top: -6px;">Subscribe and chat</h2>
+  <h4><input name="mail-waw" type="checkbox" class="mailcheck" checked="true" />Warsaw</h4>
+  <div class="mail-desc">Main discussion list - organization and problem solving.</div>
+  <h4><input name="mail-proj" type="checkbox" class="mailcheck" checked="true"/>Warsaw Projects</h4>
+  <div class="mail-desc">Information about our projects.</div>
+  <h4><input name="mail-offtopic" type="checkbox" class="mailcheck" />Off Topic</h4>
+  <div class="mail-desc">Discussion about everything and nothing. Low signal to noise ratio.</div>
+  <center>
+    <input type="text" name="email" class="email-entry" placeholder="you@example.com" />
+    <div class="mail-captcha">
+        {{ captcha() }}
+        <input type="text" name="captcha" class="email-entry" placeholder="Solve the CAPTCHA...">
+    </div>
+    <input type="submit" value="Subscribe" class="email-submit" />
+  </center>
+</form>