diff --git a/.github/workflows/code_coverage.yml b/.github/workflows/code_coverage.yml
index 8e1491adc..db1b7d36f 100644
--- a/.github/workflows/code_coverage.yml
+++ b/.github/workflows/code_coverage.yml
@@ -2,6 +2,8 @@ on: [push, pull_request]
 
 name: Code Coverage
 
+permissions: {}
+
 jobs:
   Codecov:
     name: Code Coverage
diff --git a/.github/workflows/cont_integration.yml b/.github/workflows/cont_integration.yml
index 56e1fea87..4e1358fb2 100644
--- a/.github/workflows/cont_integration.yml
+++ b/.github/workflows/cont_integration.yml
@@ -2,6 +2,8 @@ on: [push, pull_request]
 
 name: CI
 
+permissions: {}
+
 jobs:
 
   prepare:
diff --git a/.github/workflows/cron-update-rust.yml b/.github/workflows/cron-update-rust.yml
index 2fc212ebd..1264203d5 100644
--- a/.github/workflows/cron-update-rust.yml
+++ b/.github/workflows/cron-update-rust.yml
@@ -1,4 +1,7 @@
 name: Update rust version
+
+permissions: {}
+
 on:
   schedule:
     - cron: "0 0 15 * *" # At 00:00 on day-of-month 15.
diff --git a/.github/workflows/nightly_docs.yml b/.github/workflows/nightly_docs.yml
index 80e3fc787..a66881319 100644
--- a/.github/workflows/nightly_docs.yml
+++ b/.github/workflows/nightly_docs.yml
@@ -1,5 +1,7 @@
 name: Publish Nightly Docs
 
+permissions: {}
+
 on: [push, pull_request]
 
 jobs: