diff --git a/.github/workflows/check.yml b/.github/workflows/check.yml
index 29fc888..406ba9b 100644
--- a/.github/workflows/check.yml
+++ b/.github/workflows/check.yml
@@ -1,3 +1,5 @@
+permissions:
+  contents: read
 on:
   push:
     branches: [main]
@@ -20,6 +22,9 @@ jobs:
   clippy:
     runs-on: ubuntu-latest
     name: ${{ matrix.toolchain }} / clippy
+    permissions:
+      contents: read
+      checks: write
     strategy:
       fail-fast: false
       matrix:
diff --git a/.github/workflows/nostd.yml b/.github/workflows/nostd.yml
index 397a2da..7efae0f 100644
--- a/.github/workflows/nostd.yml
+++ b/.github/workflows/nostd.yml
@@ -1,3 +1,5 @@
+permissions:
+  contents: read
 on:
   push:
     branches: [main]
diff --git a/.github/workflows/safety.yml b/.github/workflows/safety.yml
index 6c973c0..4fa7ad7 100644
--- a/.github/workflows/safety.yml
+++ b/.github/workflows/safety.yml
@@ -1,3 +1,5 @@
+permissions:
+  contents: read
 on:
   push:
     branches: [main]
diff --git a/.github/workflows/scheduled.yml b/.github/workflows/scheduled.yml
index 2c15695..0215432 100644
--- a/.github/workflows/scheduled.yml
+++ b/.github/workflows/scheduled.yml
@@ -1,3 +1,5 @@
+permissions:
+  contents: read
 on:
   push:
     branches: [main]
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 4435fd7..8aa4488 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -1,3 +1,5 @@
+permissions:
+  contents: read
 on:
   push:
     branches: [main]