diff --git a/bootstrap-gruntwork-installer.sh b/bootstrap-gruntwork-installer.sh
index b898b1e..c252c61 100755
--- a/bootstrap-gruntwork-installer.sh
+++ b/bootstrap-gruntwork-installer.sh
@@ -132,7 +132,9 @@ function get_os_arch {
 function get_os_arch_gox_format {
   local -r arch=$(get_os_arch)
 
-  if string_contains "$arch" "64"; then
+  if string_contains "$arch" "arm64"; then
+    echo "arm64"
+  elif string_contains "$arch" "64"; then
     echo "amd64"
   elif string_contains "$arch" "386"; then
     echo "386"
diff --git a/gruntwork-install b/gruntwork-install
index 7b9c0f4..9e51ff1 100755
--- a/gruntwork-install
+++ b/gruntwork-install
@@ -209,7 +209,9 @@ function string_contains {
 function get_os_arch_gox_format {
   local -r arch=$(get_os_arch)
 
-  if string_contains "$arch" "64"; then
+  if string_contains "$arch" "arm64"; then
+    echo "arm64"
+  elif string_contains "$arch" "64"; then
     echo "amd64"
   elif string_contains "$arch" "386"; then
     echo "386"