diff --git a/driver/setup.py b/driver/setup.py
index cd994b5..bb62e7c 100644
--- a/driver/setup.py
+++ b/driver/setup.py
@@ -14,7 +14,7 @@
   install_requires=[            # I get to this in a second
           'pyarrow',
           'zict==1.0.0',
-          'msgpack==0.6.2',
+          'msgpack==1.2.1',
           'uproot',
           'bokeh',
           'wget',