diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 776e96eaff3..9bf715fada8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -8,6 +8,9 @@ env:
   ERLC_OPTS: "warnings_as_errors"
   LANG: C.UTF-8
 
+permissions:
+  contents: read
+
 jobs:
   test_linux:
     name: Linux, ${{ matrix.otp_release }}, Ubuntu 18.04
diff --git a/.github/workflows/notify.yml b/.github/workflows/notify.yml
index 489162b6476..99965268dfc 100644
--- a/.github/workflows/notify.yml
+++ b/.github/workflows/notify.yml
@@ -5,6 +5,9 @@ on:
     types:
       - published
 
+permissions:
+  contents: read
+
 jobs:
   notify:
     runs-on: ubuntu-18.04
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 225050e168a..3afe8fa0728 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -12,6 +12,8 @@ env:
 
 jobs:
   create_draft_release:
+    permissions:
+      contents: none
     runs-on: ubuntu-18.04
     env:
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}