diff --git a/setup.py b/setup.py
index 5a6b1e8..4062830 100644
--- a/setup.py
+++ b/setup.py
@@ -17,6 +17,7 @@
         'matplotlib',
         'numpy',
         'ruamel_yaml',
+        'solidpython',
     ],
     python_requires  = '>=3.8',
     packages         = find_packages(exclude=['docs', 'tests', 'ext']),