diff --git a/.github/workflows/cron.yml b/.github/workflows/cron.yml
index ed2522f54..bd5513227 100644
--- a/.github/workflows/cron.yml
+++ b/.github/workflows/cron.yml
@@ -32,7 +32,7 @@ jobs:
       matrix:
         include:
           - idf_branch: "release/v5.1"
-            lib_builder_branch: "master"
+            lib_builder_branch: "release/v5.1"
             targets: "esp32,esp32s2,esp32s3,esp32c3,esp32c6,esp32h2"
           - idf_branch: "release/v5.3"
             lib_builder_branch: "release/v5.3"