diff --git a/pyproject.toml b/pyproject.toml
index 1c8ae6c..09fd966 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -30,6 +30,7 @@ dependencies = [
     'numpy>=1.14.0',
     'beautifulsoup4',
     'requests',
+    'packaging',
 ]
 
 [project.optional-dependencies]