diff --git a/setup.py b/setup.py
index 40b5ebd..ed27cab 100755
--- a/setup.py
+++ b/setup.py
@@ -36,7 +36,7 @@
         'pandas', # for case-studies
         'numpy',
         'crnsimulator>=0.6',
-        'dsdobjects>=0.7'],
+        'dsdobjects>=0.7.1'],
     packages=['peppercornenumerator'],
     entry_points = {
         'console_scripts': [