diff --git a/python/metaparticle_pkg/containerize.py b/python/metaparticle_pkg/containerize.py
index 7ff5aeb..00c556a 100644
--- a/python/metaparticle_pkg/containerize.py
+++ b/python/metaparticle_pkg/containerize.py
@@ -75,7 +75,7 @@ def wrapped(*args, **kwargs):
                 self.builder.publish(self.image)
 
             def signal_handler(signal, frame):
-                self.runner.cancel(self.image)
+                self.runner.cancel(self.package.name)
                 sys.exit(0)
             signal.signal(signal.SIGINT, signal_handler)
 
diff --git a/tutorials/python/requirements.txt b/tutorials/python/requirements.txt
index 81fefc0..a72e807 100644
--- a/tutorials/python/requirements.txt
+++ b/tutorials/python/requirements.txt
@@ -1,2 +1,2 @@
 six==1.10.0
-metaparticle_pkg==0.4.1
+metaparticle_pkg>=0.4.1