diff --git a/src/bsdd/pyproject.toml b/src/bsdd/pyproject.toml
index 2704dc673e..76e0e5353a 100644
--- a/src/bsdd/pyproject.toml
+++ b/src/bsdd/pyproject.toml
@@ -26,6 +26,7 @@ classifiers = [
 dependencies = [
     "requests",
     "typing-extensions",
+    "pydantic",
 ]
 
 [project.optional-dependencies]