diff --git a/requirements/base.txt b/requirements/base.txt
index 63e524d..5b816aa 100644
--- a/requirements/base.txt
+++ b/requirements/base.txt
@@ -5,5 +5,4 @@ PyYAML
 MarkupSafe
 requests>=1.0.0
 distro>=1.0.1
-contextvars
 psutil>=5.0.0
diff --git a/requirements/zeromq.txt b/requirements/zeromq.txt
index ce3dde0..156aed7 100644
--- a/requirements/zeromq.txt
+++ b/requirements/zeromq.txt
@@ -1,9 +1,7 @@
 -r base.txt
 -r crypto.txt
 
-pyzmq<=20.0.0 ; python_version < "3.6"
-pyzmq>=17.0.0 ; python_version < "3.9"
-pyzmq>19.0.2 ; python_version >= "3.9"
+pyzmq>=19.0.2
 
 # We can't use 23+ on Windows until they fix this:
 # https://github.com/zeromq/pyzmq/issues/1472