diff --git a/src/php/.gitignore b/src/php/.gitignore
index 36c8721d53a..ecde2ca4c65 100644
--- a/src/php/.gitignore
+++ b/src/php/.gitignore
@@ -19,3 +19,4 @@ mkinstalldirs
 
 ext/grpc/ltmain.sh
 composer.lock
+vendor/