diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c4b078a..ed48358 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -6,6 +6,9 @@ on:
   pull_request:
     branches: [main]
 
+permissions:
+  contents: read
+
 env:
   CARGO_TERM_COLOR: always
   RUSTFLAGS: -D warnings
diff --git a/.github/workflows/lint.yml b/.github/workflows/lint.yml
index fe7e1b5..e541007 100644
--- a/.github/workflows/lint.yml
+++ b/.github/workflows/lint.yml
@@ -6,6 +6,9 @@ on:
   pull_request:
     branches: [main]
 
+permissions:
+  contents: read
+
 env:
   CARGO_TERM_COLOR: always
 
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 66c22f0..c6cfe34 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -6,6 +6,9 @@ on:
   pull_request:
     branches: [main]
 
+permissions:
+  contents: read
+
 env:
   CARGO_TERM_COLOR: always