diff --git a/.gitmodules b/.gitmodules
index 6bb663df1..bd8be123a 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/NCAR/ccpp-physics
+  #branch = main
+  url = https://github.com/climbfuji/ccpp-physics
+  branch = bugfix/gf_decomp_b4b
 [submodule "upp"]
   path = upp
   url = https://github.com/NOAA-EMC/UPP
diff --git a/ccpp/physics b/ccpp/physics
index 77bcfb1b3..63f4b93c4 160000
--- a/ccpp/physics
+++ b/ccpp/physics
@@ -1 +1 @@
-Subproject commit 77bcfb1b39f7e737ccffee842031dae228240227
+Subproject commit 63f4b93c47854571a6c874ed0829210069315e9a