diff --git a/setup.cfg b/setup.cfg
index ca16800c..e42fca74 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -30,6 +30,7 @@ install_requires =
     graphviz
     asdf
     stsynphot
+    pandeia.engine
 
 [options.entry_points]
 console_scripts =