diff --git a/README.md b/README.md
index 77ff191..131eb31 100644
--- a/README.md
+++ b/README.md
@@ -128,7 +128,9 @@ You can cache the installed gems with these two steps:
         restore-keys: |
           bundle-use-ruby-${{ matrix.os }}-${{ matrix.ruby }}-
     - name: bundle install
-      run: bundle install --deployment --jobs 4
+      run: |
+        bundle config deployment true
+        bundle install --jobs 4
 ```
 
 When using a single OS, replace `${{ matrix.os }}` with the OS.