diff --git a/pyproject.toml b/pyproject.toml
index 07db7ec80..10f132936 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -31,7 +31,7 @@ dependencies = [
   # (plugins.mkdocstrings.handlers.python.import)
   "frequenz-client-microgrid >= 0.6.0, < 0.7.0",
   "frequenz-channels >= 1.4.0, < 2.0.0",
-  "frequenz-quantities >= 1.0.0rc3, < 2.0.0",
+  "frequenz-quantities[marshmallow] >= 1.0.0, < 2.0.0",
   "networkx >= 2.8, < 4",
   "numpy >= 1.26.4, < 2",
   "typing_extensions >= 4.6.1, < 5",
diff --git a/src/frequenz/sdk/config/_base_schema.py b/src/frequenz/sdk/config/_base_schema.py
new file mode 100644
index 000000000..d25611958
--- /dev/null
+++ b/src/frequenz/sdk/config/_base_schema.py
@@ -0,0 +1,10 @@
+# License: MIT
+# Copyright © 2024 Frequenz Energy-as-a-Service GmbH
+
+"""Base schema for configuration classes."""
+
+from frequenz.quantities.experimental.marshmallow import QuantitySchema
+
+
+class BaseConfigSchema(QuantitySchema):
+    """A base schema for configuration classes."""