diff --git a/account_loan/__manifest__.py b/account_loan/__manifest__.py
index ef26e239..9c81692e 100644
--- a/account_loan/__manifest__.py
+++ b/account_loan/__manifest__.py
@@ -19,5 +19,8 @@
         "views/account_move_view.xml",
     ],
     "installable": True,
-    "external_dependencies": {"python": ["numpy", "numpy-financial<=1.0.0"]},
+    "external_dependencies": {
+        "python": ["numpy==1.15", "numpy-financial<=1.0.0"],
+        "deb": ["libatlas-base-dev"],
+    },
 }