diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 3531413..6caa65e 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -8,7 +8,7 @@ updates:
   - package-ecosystem: "github-actions" # See documentation for possible values
     directory: ".github/workflows" # Location of package manifests
     schedule:
-      interval: "weekly"
+      interval: "monthly"
     groups:
       actions:
         patterns:
diff --git a/tox.ini b/tox.ini
index 7db655d..127518d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -52,7 +52,7 @@ deps =
     numpy200: numpy==2.0.*
     numpy201: numpy==2.1.*
 
-    numpydev: numpy>=0.0.dev0
+    numpydev: :PIP_EXTRA_INDEX_URL:numpy
     astropydev: git+https://github.com/astropy/astropy.git#egg=astropy
 
 # The following indicates which extras_require from setup.cfg will be installed