diff -Naur a/requirements/base.txt b/requirements/base.txt
--- a/requirements/base.txt	2020-06-02 15:42:02.000000000 -0600
+++ b/requirements/base.txt	2020-06-03 12:09:35.534741001 -0600
@@ -1,5 +1,6 @@
 Jinja2
-msgpack>=0.5,!=0.5.5,<1.0.0
+## msgpack>=0.5,!=0.5.5,<1.0.0
+msgpack>=0.5.6
 PyYAML
 MarkupSafe
 requests>=1.0.0
diff -Naur a/requirements/zeromq.txt b/requirements/zeromq.txt
--- a/requirements/zeromq.txt	2020-06-02 15:42:02.000000000 -0600
+++ b/requirements/zeromq.txt	2020-06-03 12:10:00.205931146 -0600
@@ -1,5 +1,5 @@
 -r base.txt
 -r crypto.txt
 
-pyzmq>=2.2.0; python_version < '3.8'
-pyzmq>=19.0.0; python_version >= '3.8'
+pyzmq>=17.0.0; python_version < '3.8'
+pyzmq>=17.0.0; python_version >= '3.8'