diff --git a/pyproject.toml b/pyproject.toml
index 9920eec..1297ab6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -22,6 +22,7 @@ dependencies = [
     "pyepics",
     "pandas~=2.0",
     "matplotlib",
+    "zmq",
 ]
 
 [project.optional-dependencies]