diff --git a/setup.cfg b/setup.cfg
index 7ba2d5a..e69ebeb 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -19,8 +19,8 @@ zip_safe = True
 include_package_data = True
 install_requires =
     scipy >= 0.14.0
-    numpy >= 1.8.2
+    numpy (>= 1.8.2 , < 2.0)
     tables >= 3.1.1
     matplotlib (>= 1.4.1, <= 3.6)
     pyxdg
-    PyGObject >= 3.14.0
+    PyGObject (>= 3.14.0, <= 3.51.0) # girepository2.0-dev not available on bookworm