diff --git a/debian/py3versions.py b/debian/py3versions.py
index 9f15eea..6c35b04 100644
--- a/debian/py3versions.py
+++ b/debian/py3versions.py
@@ -162,6 +162,7 @@ def requested_versions(vstring, version_only=False):
         raise ValueError('No python3 versions in version string')
     if not versions:
         raise ValueError('empty set of versions')
+    versions = list(sorted(list))
     if version_only:
         return versions
     else: