diff --git a/server.py b/server.py
index 61eb7e3853dd079bdb09e9e9795bc8860d15f4f6..eec035d5e969bf3d3a5b2d3d1633dd37ae530cdc 100755
--- a/server.py
+++ b/server.py
@@ -18,6 +18,7 @@ import os
 from datetime import datetime
 import math
 import mimetypes
+import subprocess
 
 import config
 from shared import db, date_filter, datetime_filter, date_filter_long, date_filter_short, time_filter, time_filter_short, user_manager, security_manager, current_user, check_login, login_required, group_required, class_filter, needs_date_test, todostate_name_filter, code_filter, indent_tab_filter
@@ -80,6 +81,18 @@ app.jinja_env.globals.update(max=max)
 app.jinja_env.globals.update(dir=dir)
 app.jinja_env.globals.update(now=datetime.now)
 
+def get_git_revision():
+    gitlab_url = "https://git.fsmpi.rwth-aachen.de/protokollsystem/proto3"
+    commit_hash = subprocess.check_output(["git", "log", "-g", "-1", "--pretty=%H"]).decode("UTF-8").strip()
+    timestamp = int(subprocess.check_output(["git", "log", "-g", "-1", "--pretty=%at"]).strip())
+    commit_date = datetime.fromtimestamp(timestamp)
+    return {"url": gitlab_url, "hash": commit_hash, "date": commit_date}
+
+try:
+    app.jinja_env.globals["git_revision"] = get_git_revision()
+except:
+    pass
+
 # blueprints here
 
 @manager.command
diff --git a/templates/documentation.html b/templates/documentation.html
index 5c6758b5a55867938b6fb45e411f84e2ae5668b8..fd539659aa1c8805ff88fe6d9cd52dd0aadb4c60 100644
--- a/templates/documentation.html
+++ b/templates/documentation.html
@@ -214,6 +214,11 @@
         Optional kann zusätzlich eine Uhrzeit angegeben werden: <code>[sitzung;Datum;Uhrzeit]</code> (z.B. <code>[sitzung;01.01.2018;9:00]</code>).
 
 {% endif %}
+        {% if git_revision %}
+        <h3 id="version">Version</h4>
+        Dieses Protokollsystem nutzt die Software <a href="{{git_revision.url}}">„Protokollsystem 3“</a> in der Version vom <a href="{{git_revision.url}}/commit/{{git_revision.hash}}">{{git_revision.date|datify}}</a>.
+        Alle Änderungen, die seitdem hinzugekommen sind, kannst du <a href="{{git_revision.url}}/compare/{{git_revision.hash}}...master">hier</a> sehen.
+        {% endif %}
     </div>
 </div>
 {% endblock %}