diff --git a/.github/workflows/dynamic_arch.yml b/.github/workflows/dynamic_arch.yml
index 138a853dd..49139317c 100644
--- a/.github/workflows/dynamic_arch.yml
+++ b/.github/workflows/dynamic_arch.yml
@@ -2,6 +2,9 @@ name: continuous build
 
 on: [push, pull_request]
 
+permissions:
+  contents: read # to fetch code (actions/checkout)
+
 jobs:
   build:
     runs-on: ${{ matrix.os }}
diff --git a/.github/workflows/mips64.yml b/.github/workflows/mips64.yml
index a5bd7b84b..de7c0c0f3 100644
--- a/.github/workflows/mips64.yml
+++ b/.github/workflows/mips64.yml
@@ -2,6 +2,9 @@ name: mips64 qemu test
 
 on: [push, pull_request]
 
+permissions:
+  contents: read # to fetch code (actions/checkout)
+
 jobs:
   TEST:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/nightly-Homebrew-build.yml b/.github/workflows/nightly-Homebrew-build.yml
index 29ec96f73..37ffe9e83 100644
--- a/.github/workflows/nightly-Homebrew-build.yml
+++ b/.github/workflows/nightly-Homebrew-build.yml
@@ -17,6 +17,10 @@ on:
 # it only makes sense to test if this file has been changed
 
 name: Nightly-Homebrew-Build
+
+permissions:
+  contents: read # to fetch code (actions/checkout)
+
 jobs:
   build-OpenBLAS-with-Homebrew:
     runs-on: macos-latest