diff --git a/database_metrics.py b/database_metrics.py
index 96251b1..d694ea8 100644
--- a/database_metrics.py
+++ b/database_metrics.py
@@ -44,7 +44,9 @@ def get_metrics():
         """,
         ((today - timedelta(days=days - 1)).strftime("%Y-%m-%d"),),
     )
-    user_counts = dict(user_rows)
+    # PostgreSQL returns DATE values as datetime.date objects, while SQLite
+    # returns strings. Normalize both so they match the string chart labels.
+    user_counts = {str(day): count for day, count in user_rows}
     metrics["users_per_day"] = [user_counts.get(date, 0) for date in date_labels]
 
     # Comparisons created per day
@@ -56,7 +58,7 @@ def get_metrics():
         """,
         ((today - timedelta(days=days - 1)).strftime("%Y-%m-%d"),),
     )
-    comp_counts = dict(comp_rows)
+    comp_counts = {str(day): count for day, count in comp_rows}
     metrics["comparisons_per_day"] = [comp_counts.get(date, 0) for date in date_labels]
 
     # Images uploaded per day (by image_positions join comparisons for date)
@@ -70,7 +72,7 @@ def get_metrics():
         """,
         ((today - timedelta(days=days - 1)).strftime("%Y-%m-%d"),),
     )
-    img_counts = dict(img_rows)
+    img_counts = {str(day): count for day, count in img_rows}
     metrics["images_per_day"] = [img_counts.get(date, 0) for date in date_labels]
 
     metrics["date_labels"] = date_labels
diff --git a/templates/metrics.jinja b/templates/metrics.jinja
index b86cb9f..8effbf6 100644
--- a/templates/metrics.jinja
+++ b/templates/metrics.jinja
@@ -112,7 +112,7 @@
         </div>
     </div>
 </div>
-<script src="https://cdn.jsdelivr.net/npm/chart.js"></script>
+<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/4.5.1/chart.min.js"></script>
 <script>
     // Use Jinja tojson filter for safe JS injection
     const dateLabels = {{ metrics.date_labels | tojson }};
diff --git a/tests/test_metrics.py b/tests/test_metrics.py
index 681333a..c002e0d 100644
--- a/tests/test_metrics.py
+++ b/tests/test_metrics.py
@@ -1,3 +1,5 @@
+from datetime import date
+
 import database
 import database_metrics
 
@@ -32,6 +34,20 @@ def test_metrics_report_database_and_local_storage(isolated_db, tmp_path, monkey
     assert len(metrics["comparisons_per_day"]) == 14
 
 
+def test_metrics_daily_counts_match_date_objects(isolated_db, monkeypatch):
+    today = date.today()
+    daily_results = iter([[(today, 2)], [(today, 3)], [(today, 4)]])
+    monkeypatch.setattr(database_metrics, "query", lambda *_args: next(daily_results))
+    monkeypatch.setattr(database_metrics, "is_s3_enabled", lambda: False)
+
+    metrics = database_metrics.get_metrics()
+
+    today_index = metrics["date_labels"].index(today.isoformat())
+    assert metrics["users_per_day"][today_index] == 2
+    assert metrics["comparisons_per_day"][today_index] == 3
+    assert metrics["images_per_day"][today_index] == 4
+
+
 def test_metrics_sum_s3_metadata_sizes(isolated_db, monkeypatch):
     comparison_id = "77777777-7777-7777-7777-777777777777"
     database.create_comparison(comparison_id, "S3", None, [], {}, None)