diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 1545ae87dca016..c0744ce5033f3e 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -19,6 +19,9 @@ on:
     - 3.8
     - 3.7
 
+permissions:
+  contents: read
+
 jobs:
   check_source:
     name: 'Check for source changes'
diff --git a/.github/workflows/build_msi.yml b/.github/workflows/build_msi.yml
index 201098a635799a..04917ff184aa64 100644
--- a/.github/workflows/build_msi.yml
+++ b/.github/workflows/build_msi.yml
@@ -20,6 +20,9 @@ on:
     paths:
     - 'Tools/msi/**'
 
+permissions:
+  contents: read
+
 jobs:
   build_win32:
     name: 'Windows (x86) Installer'
diff --git a/.github/workflows/doc.yml b/.github/workflows/doc.yml
index e2501589d6e6a5..eb4884a487325a 100644
--- a/.github/workflows/doc.yml
+++ b/.github/workflows/doc.yml
@@ -20,6 +20,9 @@ on:
     - 'Doc/**'
     - 'Misc/**'
 
+permissions:
+  contents: read
+
 jobs:
   build_doc:
     name: 'Docs'