diff --git a/.drone.yml b/.drone.yml
index 80e7fe9..88deb88 100644
--- a/.drone.yml
+++ b/.drone.yml
@@ -12,6 +12,10 @@ trigger:
       - pull_request
 
 steps:
+- name: commit hash magic
+  image: bitnami/git:2.33.0
+  commands: 
+  - git show -s --format=%H | tee hash
 - name: kaniko
   image: plugins/kaniko
   settings:
diff --git a/.gitignore b/.gitignore
index 3562f45..686fc35 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 .vscode/
 dist/
+hash
\ No newline at end of file
diff --git a/Dockerfile b/Dockerfile
index 3c2d800..dcf2aa0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,6 +9,7 @@ RUN pip install pipenv && pipenv install --system
 COPY app.py /app/app.py
 COPY templates/ /app/templates
 COPY data/ /app/data
+COPY hash /app/hash
 
 RUN python ./app.py
 
diff --git a/app.py b/app.py
index ad599a2..aebc1f3 100644
--- a/app.py
+++ b/app.py
@@ -26,11 +26,16 @@ update = date.today()
 tijden = render("tijden.md")
 nieuws = render("nieuws.md")
 
+def read_hash():
+    with open("hash") as f:
+        line = f.readline()
+        return {"long": line, "short": line[0:7]}
 
 inject_now = {'now': date.today().year,
             'tijden': tijden,
             'nieuws': nieuws,
-            'update': update}
+            'update': update,
+            'hash': read_hash()}
 
 
 
diff --git a/templates/sidebar.html b/templates/sidebar.html
index 857f8a9..2a74f12 100644
--- a/templates/sidebar.html
+++ b/templates/sidebar.html
@@ -54,6 +54,7 @@
     <hr style="height: 2px;"/>
     <p style="margin-top: 16px; height: 40px;">Laatste
         update: {{ update }}<br/>
+        <a href="https://git.voidcorp.nl/j00lz/galerie-site/commit/{{hash.long}}">Build {{hash.short}}</a><br>
         Webmaster: <a href="mailto:webmaster@galerievanslagmaat.nl?SUBJECT=Website Galerie van Slagmaat">Julius de
             Jeu</a>