diff --git a/pyproject.toml b/pyproject.toml
index ffdef0c..11d2eea 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,6 +18,7 @@ classifiers = [
 ]
 dependencies = [
   'asdf >= 2.12.1',
+  'asdf-standard >= 1.1.0',
 ]
 dynamic = ['version']