diff --git a/aws-cli/run.sh b/aws-cli/run.sh
index 4085e3a..121f7b5 100755
--- a/aws-cli/run.sh
+++ b/aws-cli/run.sh
@@ -18,7 +18,14 @@ AWS_DEFAULT_REGION=eu-central-1
 CUSTOM_ARGS=""
 
 CURRENT_DATE="$(date +%Y-%m-%d)"
-EXPIRES=$(date '+%a, %d %b %Y 00:00:00 GMT' -d "${CURRENT_DATE} + 365 day")
+platform=$(uname)
+
+if [[ ${platform} = "FreeBSD" ]] || [[ ${platform} = "Darwin" ]]; then
+	EXPIRES=$(date -v+365d '+%a, %d %b %Y 00:00:00 GMT')
+else
+	EXPIRES=$(date '+%a, %d %b %Y 00:00:00 GMT' -d "${CURRENT_DATE} + 365 day")
+fi
+
 CACHE_MAX_AGE="31536000"
 ACL="public-read"