diff --git a/eng/scripts/install-nginx-mac.sh b/eng/scripts/install-nginx-mac.sh
index b44bd5d92866..e7df86f57c0a 100755
--- a/eng/scripts/install-nginx-mac.sh
+++ b/eng/scripts/install-nginx-mac.sh
@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
 
 brew update
-brew install openssl nginx
+brew list openssl || brew install openssl
+brew list nginx || brew install nginx