diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 3a745d88b04..1d29d47a995 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -3,17 +3,16 @@ name: build
 'on':
   push:
     branches:
-      - master
-  pull_request:
-    branches:
-      - master
+      - '5.5'
   # Allows you to run this workflow manually from the Actions tab
   workflow_dispatch:
+permissions:
+  contents: read # to fetch code (actions/checkout)
 jobs:
   build:
     runs-on: ubuntu-latest
     container:
-      image: kamailio/pkg-kamailio-docker:dev-${{ matrix.distribution }}
+      image: ghcr.io/kamailio/pkg-kamailio-docker:${{ github.ref_name }}-${{ matrix.distribution }}
       volumes:
         - ${{ github.workspace }}:/code
       env:
@@ -32,7 +31,7 @@ jobs:
             compilier: clang
     steps:
       - uses: actions/checkout@v2
-      - uses: ammaraskar/gcc-problem-matcher@0.1
+      - uses: ammaraskar/gcc-problem-matcher@0.2.0
       - name: build
         run: |
           cd /code