diff --git a/.github/workflows/documentation.yml b/.github/workflows/documentation.yml
index 3cac4c7..9fc804e 100644
--- a/.github/workflows/documentation.yml
+++ b/.github/workflows/documentation.yml
@@ -7,6 +7,9 @@ on:
     branches:
       - main
 
+permissions:
+  contents: write
+
 jobs:
   documentation:
     name: Generate documentation
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 576eeea..399f665 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -4,6 +4,9 @@ name: pdberellig tests
 
 on: push
 
+permissions:
+  contents: read
+
 jobs:
   pytest:
     name: Run unit tests