diff --git a/requirements.txt b/requirements.txt
index 2542dcc..ff3c848 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -33,3 +33,4 @@ pydantic!=1.10.0 # https://twitter.com/Czaki_PL/status/1564908046186434566?s=20&
 napari-pystackreg
 imageio!=2.22.1 # https://github.com/napari/napari/pull/5168
 redlionfish
+jupyter_server<2.0.0 # https://github.com/jupyter-server/jupyter_server/issues/1127
diff --git a/setup.cfg b/setup.cfg
index de42942..9d93d6a 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -62,6 +62,7 @@ install_requires =
     napari-pystackreg
     imageio!=2.22.1 # https://github.com/napari/napari/pull/5168
     redlionfish
+    jupyter_server<2.0.0 # https://github.com/jupyter-server/jupyter_server/issues/1127
 
 [options.entry_points] 
 napari.plugin =