diff --git a/setup.py b/setup.py
index 40cdf996..39cf8bb6 100644
--- a/setup.py
+++ b/setup.py
@@ -52,7 +52,7 @@
     requires = [
         # NB: keep this in sync with vis/requirements.txt and vis/optional_requirements.txt
         # NB2: I left out the optional requirements and mock, since they aren't *required*
-        'music21 (>= 1.9.3, <2.0)',
+        'music21 (>= 1.9.3, <2.1)',
         'pandas (>=0.14.1, <0.16)',
         ],
     install_requires = [