diff --git a/pyproject.toml b/pyproject.toml
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -38,6 +38,7 @@ dependencies = [
     "scipy>=1.9.3",
     "braillegraph>=0.6",
     "tenacity>=8.2.2",
+    "zmq>=0.0.0",
 ]
 requires-python = ">=3.10"