diff --git a/.github/workflows/java-ci.yml b/.github/workflows/java-ci.yml
index dbbeb3d..a8dc9df 100644
--- a/.github/workflows/java-ci.yml
+++ b/.github/workflows/java-ci.yml
@@ -1,5 +1,8 @@
 name: Java CI
 
+permissions:
+  contents: read
+
 on:
   push:
     branches: [ '*', '*/*' ]
diff --git a/.github/workflows/javadoc.yml b/.github/workflows/javadoc.yml
index da3cecf..4a42f91 100644
--- a/.github/workflows/javadoc.yml
+++ b/.github/workflows/javadoc.yml
@@ -1,5 +1,9 @@
 name: Javadoc
 
+permissions:
+  contents: read
+  pages: write
+
 on:
   release:
     types: [ created ]
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 2d65a1f..96b967b 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -1,5 +1,8 @@
 name: Publish package to the Maven Central Repository
 
+permissions:
+  contents: read
+
 on:
   release:
     types: [ created ]