diff --git a/install-script.sh b/install-script.sh
index 5d89054..e7d9f25 100644
--- a/install-script.sh
+++ b/install-script.sh
@@ -2,7 +2,12 @@
 
 # Source https://pentacent.medium.com/nginx-and-lets-encrypt-with-docker-in-less-than-5-minutes-b4b8a60d3a71
 
-if ! [ -x "$(command -v docker compose)" ]; then
+if ! [ -x "$(command -v docker)" ]; then
+  echo 'Error: docker is not installed.' >&2
+  exit 1
+fi
+
+if ! [ -x "$(command -v compose)" ]; then
   echo 'Error: docker compose is not installed.' >&2
   exit 1
 fi