diff --git a/.gitmodules b/.gitmodules
index b1f475b64..de2edab38 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,9 +1,11 @@
 [submodule "spack"]
   path = spack
-  #url = https://github.com/spack/spack
-  #branch = develop
-  url = https://github.com/jcsda/spack
-  branch = jcsda_emc_spack_stack
+  ##url = https://github.com/spack/spack
+  ##branch = develop
+  #url = https://github.com/jcsda/spack
+  #branch = jcsda_emc_spack_stack
+  url = https://github.com/climbfuji/spack
+  branch = feature/pytorch_internal_protobuf
 [submodule "doc/CMakeModules"]
   path = doc/CMakeModules
   url = https://github.com/noaa-emc/cmakemodules
diff --git a/spack b/spack
index b1f29d9c8..d95bf8fba 160000
--- a/spack
+++ b/spack
@@ -1 +1 @@
-Subproject commit b1f29d9c8105f36390e6e8f0178ab6e6005b30d6
+Subproject commit d95bf8fba7da1b0cf68851bf11dffa4852dc440f
diff --git a/spack-ext/repos/spack-stack/packages/ai-env/package.py b/spack-ext/repos/spack-stack/packages/ai-env/package.py
index 1d50e0a78..2d7379f45 100644
--- a/spack-ext/repos/spack-stack/packages/ai-env/package.py
+++ b/spack-ext/repos/spack-stack/packages/ai-env/package.py
@@ -18,6 +18,6 @@ class AiEnv(BundlePackage):
     version("1.0.0")
 
     depends_on("jedi-base-env", type="run")
-    depends_on("py-torch", type="run")
+    depends_on("py-torch +internal-protobuf", type="run")
 
     # There is no need for install() since there is no code.