diff --git a/setup.py b/setup.py
index 1c899402..28941930 100644
--- a/setup.py
+++ b/setup.py
@@ -83,6 +83,7 @@ cx_Freeze.setup(
     executables=exes,
     options={
         "build_exe": {
+            "packages": ["websockets"],
             "includes": [],
             "excludes": ["numpy", "Cython", "PySide2", "PIL",
                          "pandas"],