diff --git a/openapi/build b/openapi/build
index 08b990b..bbfbccb 100755
--- a/openapi/build
+++ b/openapi/build
@@ -18,4 +18,9 @@ openapi-generator-cli generate \
 
 echo ""
 
+case "$GENERATOR" in
+  php)
+    (cd "$OUT" && composer install)
+    ;;
+esac
 tree "$OUT"