diff --git a/repo2docker/docker.py b/repo2docker/docker.py
index 170eea3f..830e5c78 100644
--- a/repo2docker/docker.py
+++ b/repo2docker/docker.py
@@ -117,7 +117,7 @@ def images(self):
 
     def inspect_image(self, image):
         image = self._apiclient.inspect_image(image)
-        return Image(tags=image["RepoTags"], config=image["ContainerConfig"])
+        return Image(tags=image["RepoTags"], config=image["Config"])
 
     def push(self, image_spec):
         if self.registry_credentials: