diff --git a/repo2docker/app.py b/repo2docker/app.py
index 0d817452..5a48c5ab 100755
--- a/repo2docker/app.py
+++ b/repo2docker/app.py
@@ -459,7 +459,7 @@ def _dry_run_changed(self, change):
     )
 
     base_image = Unicode(
-        "docker.io/library/buildpack-deps:jammy",
+        "docker.io/library/buildpack-deps:24.04",
         config=True,
         help="""
         Base image to use when building docker images.