diff --git a/.github/workflows/vaccine.yml b/.github/workflows/vaccine.yml
index 13b038b..be42d19 100644
--- a/.github/workflows/vaccine.yml
+++ b/.github/workflows/vaccine.yml
@@ -33,7 +33,7 @@ jobs:
         engine:
           - name: ruby
             version: '3.4'
-            validate: false
+            validate: true
           - name: ruby
             version: '3.3'
             validate: true
@@ -51,7 +51,7 @@ jobs:
             validate: true
           - name: ruby
             version: '2.6'
-            validate: false
+            validate: true
           - name: ruby
             version: '2.5'
             validate: false