diff --git a/install.sh b/install.sh
index 5a94abe..de82bc3 100755
--- a/install.sh
+++ b/install.sh
@@ -3,13 +3,17 @@
 # Ref: https://github.com/denoland/deno_install
 # TODO(everyone): Keep this script simple and easily auditable.
 
-# TODO(mf): this should work on Linux and macOS. Not intended for Windows. 
+# TODO(mf): this should work on Linux and macOS. Not intended for Windows.
 
 set -e
 
-os=$(uname -s)
+os=$(uname -s | tr '[:upper:]' '[:lower:]')
 arch=$(uname -m)
 
+if [ "$arch" = "aarch64" ]; then
+	arch="arm64"
+fi
+
 if [ $# -eq 0 ]; then
 	goose_uri="https://github.com/pressly/goose/releases/latest/download/goose_${os}_${arch}"
 else