diff --git a/.github/workflows/build_pr.yml b/.github/workflows/build_pr.yml
index fae513f..ee588d4 100644
--- a/.github/workflows/build_pr.yml
+++ b/.github/workflows/build_pr.yml
@@ -4,6 +4,7 @@ on:
     pull_request:
         branches:
             - master
+            - v5-lts
 
 jobs:
     build: