diff --git a/setup.py b/setup.py
index 686449c5c..75442ecc8 100644
--- a/setup.py
+++ b/setup.py
@@ -23,6 +23,7 @@
     "pyscal~=0.6.1",
     "pyvista>=0.23",
     "pyyaml>=5.2",
+    "semeio==0.5.6",
     "scikit-learn>=0.22",
     "scipy>=1.4",
     "webviz-config>=0.0.42",