diff --git a/.github/workflows/release-github.yml b/.github/workflows/release-github.yml
index 1806bf8..c22208b 100644
--- a/.github/workflows/release-github.yml
+++ b/.github/workflows/release-github.yml
@@ -1,5 +1,7 @@
 name: Release on github
 
+permissions: {}
+
 on:
   push:
     branches:
diff --git a/.github/workflows/release-rubygem.yml b/.github/workflows/release-rubygem.yml
index ed0f34c..a2620d5 100644
--- a/.github/workflows/release-rubygem.yml
+++ b/.github/workflows/release-rubygem.yml
@@ -1,5 +1,7 @@
 name: Release ruby gem
 
+permissions: {}
+
 on:
   push:
     branches:
diff --git a/.github/workflows/test-ruby.yml b/.github/workflows/test-ruby.yml
index 3b1ae9f..a15cbf9 100644
--- a/.github/workflows/test-ruby.yml
+++ b/.github/workflows/test-ruby.yml
@@ -1,5 +1,7 @@
 name: Test
 
+permissions: {}
+
 on:
   push:
     branches: