diff --git a/src/batdetect2/cli/data.py b/src/batdetect2/cli/data.py
index 4b13224..fc2a610 100644
--- a/src/batdetect2/cli/data.py
+++ b/src/batdetect2/cli/data.py
@@ -73,7 +73,7 @@ def summary(
 
     summary = compute_class_summary(dataset, targets)
 
-    print(summary.to_markdown())
+    print(summary.sort_values("class_name").to_markdown())
 
 
 @data.command(short_help="Convert dataset config to annotation set.")