diff --git a/requirements/environment.yml b/requirements/environment.yml
index a3d7a5dc..b3681528 100644
--- a/requirements/environment.yml
+++ b/requirements/environment.yml
@@ -9,7 +9,6 @@ dependencies:
 - jupyter_client
 - pygments
 - ipykernel
-- pyzmq >=17.1
 
 # For testing
 - coveralls
diff --git a/setup.py b/setup.py
index a5968e6d..47b8729e 100644
--- a/setup.py
+++ b/setup.py
@@ -71,7 +71,6 @@
         'pygments',
         'ipykernel>=4.1', # not a real dependency, but require the reference kernel
         'qtpy>=2.4.0',
-        'pyzmq>=17.1',
         'packaging'
     ],
     extras_require = {