diff --git a/.github/workflows/core-build.yml b/.github/workflows/core-build.yml
index 2dc55f4..eda6470 100644
--- a/.github/workflows/core-build.yml
+++ b/.github/workflows/core-build.yml
@@ -2,6 +2,9 @@ name: PSC-Java Build
 
 on: [pull_request]
 
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: ubuntu-latest
diff --git a/.github/workflows/it-case-tests.yml b/.github/workflows/it-case-tests.yml
index 3aefa4b..1d254df 100644
--- a/.github/workflows/it-case-tests.yml
+++ b/.github/workflows/it-case-tests.yml
@@ -2,6 +2,9 @@ name: ITCase Tests
 
 on: [pull_request]
 
+permissions:
+  contents: read
+
 jobs:
   build: