diff --git a/.github/workflows/endtoend_tests.yml b/.github/workflows/endtoend_tests.yml
index db432f1..90a50d3 100644
--- a/.github/workflows/endtoend_tests.yml
+++ b/.github/workflows/endtoend_tests.yml
@@ -1,5 +1,8 @@
 name: End to end tests
 
+permissions:
+    contents: read
+
 on:
     workflow_call:
 #        inputs:
diff --git a/.github/workflows/integration_tests.yml b/.github/workflows/integration_tests.yml
index e582fc7..b55048f 100644
--- a/.github/workflows/integration_tests.yml
+++ b/.github/workflows/integration_tests.yml
@@ -1,5 +1,8 @@
 name: Integration tests
 
+permissions:
+    contents: read
+
 on:
     workflow_call:
 
diff --git a/.github/workflows/interop_tests.yml b/.github/workflows/interop_tests.yml
index 7dfa9fa..d61e3d9 100644
--- a/.github/workflows/interop_tests.yml
+++ b/.github/workflows/interop_tests.yml
@@ -1,5 +1,8 @@
 name: Interop tests
 
+permissions:
+    contents: read
+
 on:
     workflow_call:
 
diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 0bd35a1..57a915b 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -1,5 +1,8 @@
 name: main
 
+permissions:
+    contents: read
+
 on:
     push:
         branches:
diff --git a/.github/workflows/pull_request.yml b/.github/workflows/pull_request.yml
index 16c01ff..4c7e684 100644
--- a/.github/workflows/pull_request.yml
+++ b/.github/workflows/pull_request.yml
@@ -1,5 +1,8 @@
 name: PR
 
+permissions:
+    contents: read
+
 on:
     pull_request:
         types: [opened, reopened, synchronize]