diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b615060..d3dc5d0 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -9,6 +9,9 @@
 env:
   BUILD_DEPS: automake bison flex git libboost-all-dev libevent-dev libssl-dev libtool make pkg-config
 
+permissions:
+  contents: read
+
 jobs:
   # TODO windows and macos
   compiler: