diff --git a/docs/_installer/init.sh b/docs/_installer/init.sh
index 28ced2fb..c3f782c2 100644
--- a/docs/_installer/init.sh
+++ b/docs/_installer/init.sh
@@ -12,6 +12,10 @@
 # This is just a little script that can be downloaded from the internet to
 # install wasm-pack. It just does platform detection, downloads the installer
 # and runs it.
+if [ -z "$BASH_VERSION" ]; then
+    curl https://drager.github.io/wasm-pack/installer/init.sh -sSf | bash
+    exit "$?"
+fi
 
 set -u
 
@@ -39,6 +43,11 @@ if [ -z "${VERSION:-}" ]; then
     fi
 fi
 
+err() {
+    say "$1" >&2
+    exit 1
+}
+
 # Resolve "latest" to actual version number
 if [ "$VERSION" = "latest" ]; then
     VERSION=$(curl -s https://api.github.com/repos/drager/wasm-pack/releases/latest | grep '"tag_name"' | sed -E 's/.*"v?([^"]+)".*/\1/')
@@ -187,11 +196,6 @@ say() {
     echo "wasm-pack-init: $1"
 }
 
-err() {
-    say "$1" >&2
-    exit 1
-}
-
 need_cmd() {
     if ! check_cmd "$1"
     then err "need '$1' (command not found)"