diff --git a/generators/sha3 b/generators/sha3
index 60ddfe7c..e27d808c 160000
--- a/generators/sha3
+++ b/generators/sha3
@@ -1 +1 @@
-Subproject commit 60ddfe7c5b2c1640d91e7d9a35c65011c1600810
+Subproject commit e27d808cf1a637a8f2a80fc5dcde44c3d0a41c5c
diff --git a/scripts/init-submodules-no-riscv-tools.sh b/scripts/init-submodules-no-riscv-tools.sh
index d8842050..c61f8b3e 100755
--- a/scripts/init-submodules-no-riscv-tools.sh
+++ b/scripts/init-submodules-no-riscv-tools.sh
@@ -32,6 +32,9 @@ for name in toolchains/*/*/ ; do
 done
 git config submodule.toolchains/qemu.update none
 
+# Don't automatically initialize generators with big submodules (e.g. linux source)
+git config submodule.generators/sha3.update none
+
 # Disable updates to the FireSim submodule until explicitly requested
 git config submodule.sims/firesim.update none
 # Disable updates to the hammer tool plugins repos
@@ -49,6 +52,10 @@ git config --unset submodule.vlsi/hammer-cadence-plugins.update
 git config --unset submodule.vlsi/hammer-synopsys-plugins.update
 git config --unset submodule.vlsi/hammer-mentor-plugins.update
 
+git config --unset submodule.generators/sha3.update
+# Shallow clone by default (recursive clone would get linux)
+git submodule update --init generators/sha3
+
 if [ $NO_FIRESIM = false ]; then
   echo "initializing firesim"
   # Renable firesim and init only the required submodules to provide
diff --git a/sims/firesim b/sims/firesim
index c3a4731a..cfeb0e67 160000
--- a/sims/firesim
+++ b/sims/firesim
@@ -1 +1 @@
-Subproject commit c3a4731a604973d7b2b420a308116e9e3e093dc3
+Subproject commit cfeb0e67fe58f896b95459e110802903fed5145a