diff --git a/setup.cfg b/setup.cfg
index 2f47514..f323366 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -43,8 +43,8 @@ fitgalsim = specsim.fitgalsim:main
 [options.extras_require]
 docs =
     sphinx-astropy
-    git+https://github.com/desihub/desiutil.git@3.4.2
-    git+https://github.com/desihub/desimodel.git@0.19.1
+    desiutil @ https://github.com/desihub/desiutil/archive/refs/tags/3.4.2.tar.gz
+    desimodel @ https://github.com/desihub/desimodel/archive/refs/tags/0.19.1.tar.gz
 
 [tool:pytest]
 testpaths = "specsim" "docs"