diff --git a/packages/react-router/test/base/scripts/sync.sh b/packages/react-router/test/base/scripts/sync.sh
index 1be037080b..ad0d879c77 100644
--- a/packages/react-router/test/base/scripts/sync.sh
+++ b/packages/react-router/test/base/scripts/sync.sh
@@ -15,4 +15,4 @@ npm pack ../../../../react
 npm pack ../../../
 
 # Install Dependencies
-npm install *.tgz --no-save
+npm install *.tgz --no-save --legacy-peer-deps