diff --git a/scripts/build.py b/scripts/build.py
index 4a539e4e..28be04f1 100644
--- a/scripts/build.py
+++ b/scripts/build.py
@@ -287,6 +287,7 @@ def build_command(arguments):
         "psutil",
         "asyncio",
         "packaging",  # needed for linux
+        "packaging.specifiers",
         "appdirs",
         "idna",  # required by aiohttp >= 2.3, cannot be found by cx_Freeze
     ]