diff --git a/app/main.py b/app/main.py
index caaadd3..c1d3179 100644
--- a/app/main.py
+++ b/app/main.py
@@ -6,6 +6,7 @@ from wtforms import StringField, SubmitField, IntegerField
 from wtforms.validators import DataRequired, Length, NumberRange
 from .db import db, Accomplishment
 from datetime import datetime, timedelta
+import time
 
 main = Blueprint('main', __name__)
 
@@ -72,6 +73,7 @@ def get_day_template_data(day_string):
         },
         "accomplishments": accomplishments,
         "total_xp": sum(a.difficulty for a in accomplishments),
+        "ts": int(time.time()),  # timestamp for cachebusting
     }
 
 
diff --git a/app/templates/main/app.html b/app/templates/main/app.html
index 73513a2..6a14445 100644
--- a/app/templates/main/app.html
+++ b/app/templates/main/app.html
@@ -13,7 +13,7 @@
     </form>
 </div>
 <div class="max-w-lg mx-auto card">
-    <img class="w-full h-48" src="{{ url_for('graph.graph_svg') }}">
+    <img class="w-full h-48" src="{{ url_for('graph.graph_svg', ts=ts) }}">
 </div>
 <div class="max-w-lg mx-auto card">
     <div class="flex items-center justify-between mb-4">