diff --git a/tox.ini b/tox.ini
index 7125a7a..51d46a8 100644
--- a/tox.ini
+++ b/tox.ini
@@ -38,16 +38,16 @@ description =
     xdist: using parallel processing
 package = editable
 set_env =
-    devdeps: PIP_EXTRA_INDEX_URL = https://pypi.anaconda.org/scientific-python-nightly-wheels/simple
+    devdeps: PIP_EXTRA_INDEX_URL = https://pypi.anaconda.org/astropy/simple https://pypi.anaconda.org/scientific-python-nightly-wheels/simple
 deps =
     pytest
     ci_watson
     xdist: pytest-xdist
     cov: pytest-cov
-commands_pre =
-    devdeps: pip install numpy>=0.0.dev0 git+https://github.com/astropy/astropy -U --upgrade-strategy eager
-    pip freeze
+    devdeps: numpy>=0.0.dev0
+    devdeps: astropy>=0.0.dev0
 commands =
+    pip freeze
     pytest \
     cov: --cov . --cov-report term-missing --cov-report xml \
     warnings: -W error \
@@ -67,4 +67,4 @@ skip_install = true
 deps =
     build
 commands =
-    python -m build .
\ No newline at end of file
+    python -m build .