diff --git a/.gitmodules b/.gitmodules
index 6bb663df1..ecf2fb0b9 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -8,8 +8,10 @@
   branch = main
 [submodule "ccpp/physics"]
   path = ccpp/physics
-  url = https://github.com/NCAR/ccpp-physics
-  branch = main
+  url = https://github.com/grantfirl/ccpp-physics
+  branch = sfc_flux_spec_update
+  #url = https://github.com/NCAR/ccpp-physics
+  #branch = main
 [submodule "upp"]
   path = upp
   url = https://github.com/NOAA-EMC/UPP