diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ca06eb67..fb13efe6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -5,6 +5,10 @@ on:
   pull_request:
     branches: [ "**" ]
 
+permissions:
+  contents: read
+  pull-requests: read
+
 jobs:
   unit:
     uses: ./.github/workflows/run_tests.yml
diff --git a/.github/workflows/run_tests.yml b/.github/workflows/run_tests.yml
index 65cfee2a..f6dc9daf 100644
--- a/.github/workflows/run_tests.yml
+++ b/.github/workflows/run_tests.yml
@@ -15,6 +15,9 @@ env:
   # If set, uv will run without updating the uv.lock file. Equivalent to the `uv run --frozen`.
   UV_FROZEN: "1"
 
+permissions:
+  contents: read
+
 jobs:
   ruff:
     name: Ruff