diff --git a/.github/workflows/ubuntu-system-deps-build.yml b/.github/workflows/ubuntu-system-deps-build.yml
index 7e94a897b..6122d3be5 100644
--- a/.github/workflows/ubuntu-system-deps-build.yml
+++ b/.github/workflows/ubuntu-system-deps-build.yml
@@ -3,11 +3,10 @@ name: Ubuntu CI full build
 on:
   push:
     branches:
-      - main
-      - develop
-      - release/*
       - ci/*
       - dependabot/*
+  schedule:
+    - cron: '00 00 * * 0'
 jobs:
 
   build:
diff --git a/.github/workflows/windows-vcpkg-deps-build.yml b/.github/workflows/windows-vcpkg-deps-build.yml
index a15055b59..de5837e30 100644
--- a/.github/workflows/windows-vcpkg-deps-build.yml
+++ b/.github/workflows/windows-vcpkg-deps-build.yml
@@ -3,13 +3,11 @@ name: Windows CI full build
 on:
   push:
     branches:
-      - main
-      - develop
-      - release/*
       - ci/*
       - dependabot/*
+  schedule:
+    - cron: '00 00 * * 0'
 jobs:
-
   windows:
 
     runs-on: ${{ matrix.os }}