diff --git a/backend/services/chart-service/pyproject.toml b/backend/services/chart-service/pyproject.toml
index 388fc75..e9f7e96 100644
--- a/backend/services/chart-service/pyproject.toml
+++ b/backend/services/chart-service/pyproject.toml
@@ -13,3 +13,7 @@ alembic = "^1.14"
 pydantic = "^2.10"
 pydantic-settings = "^2.7"
 httpx = "^0.27"
+
+[build-system]
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"
diff --git a/backend/services/data-service/pyproject.toml b/backend/services/data-service/pyproject.toml
index f3a401d..61881b9 100644
--- a/backend/services/data-service/pyproject.toml
+++ b/backend/services/data-service/pyproject.toml
@@ -16,3 +16,7 @@ pandas = "^2.2"
 python-multipart = "^0.0.18"
 pydantic = "^2.10"
 pydantic-settings = "^2.7"
+
+[build-system]
+requires = ["poetry-core"]
+build-backend = "poetry.core.masonry.api"