diff --git a/tox.ini b/tox.ini
index bfa82af..5e69b69 100644
--- a/tox.ini
+++ b/tox.ini
@@ -56,6 +56,8 @@ deps =
     sunpy-!dev,all-!dev: sunpy[tests,all]
     sunpy-dev,all-dev: sunpy[tests,all] @ git+https://github.com/sunpy/sunpy.git
 
+    numpy==2.0.0rc1
+
 skip_install = true
 
 allowlist_externals =