diff --git a/pyproject.toml b/pyproject.toml
index adfd73d..5f1db85 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -12,7 +12,9 @@ classifiers = [
     "Programming Language :: Python :: 3",
     "Topic :: Scientific/Engineering",
 ]
-dependencies = []
+dependencies = [
+    "slsdet~=9.0",
+]
 
 [project.optional-dependencies]
 dev = [