diff --git a/pyproject.toml b/pyproject.toml
index 36c76eb..572b203 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,6 +7,7 @@ authors = [{name = "Common Partial Wave Analysis", email = "compwa-admin@ep1.rub
 dependencies = [
     "PyGithub",
     "PyYAML",
+    "attrs",
     "pydantic >=2",
     "pytablewriter[html]",
     "python-dateutil",
diff --git a/uv.lock b/uv.lock
index bb4bfb0..1277040 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1689,6 +1689,7 @@ name = "pwa-pages"
 version = "0.0.0"
 source = { editable = "." }
 dependencies = [
+    { name = "attrs" },
     { name = "pydantic" },
     { name = "pygithub" },
     { name = "pytablewriter", extra = ["html"] },
@@ -1697,7 +1698,7 @@ dependencies = [
     { name = "pyyaml" },
 ]
 
-[package.dev-dependencies]
+[package.dependency-groups]
 dev = [
     { name = "feynman" },
     { name = "jupyterlab" },
@@ -1794,6 +1795,7 @@ types = [
 
 [package.metadata]
 requires-dist = [
+    { name = "attrs" },
     { name = "pydantic", specifier = ">=2" },
     { name = "pygithub" },
     { name = "pytablewriter", extras = ["html"] },
@@ -1802,7 +1804,7 @@ requires-dist = [
     { name = "pyyaml" },
 ]
 
-[package.metadata.requires-dev]
+[package.metadata.dependency-groups]
 dev = [
     { name = "feynman" },
     { name = "jupyterlab" },