diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 989fa61d..10812819 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -10,7 +10,7 @@ on:
 jobs:
   minimum_user:
     name: minimum user
-    uses: arkedge/workflows-c2a/.github/workflows/build.yml@v2.5.0
+    uses: arkedge/workflows-c2a/.github/workflows/build.yml@v5.1.0
     with:
       c2a_dir: Examples/minimum_user
       c2a_custom_setup: |
@@ -25,7 +25,7 @@ jobs:
 
   second_obc_user:
     name: 2nd obc user
-    uses: arkedge/workflows-c2a/.github/workflows/build.yml@v2.5.0
+    uses: arkedge/workflows-c2a/.github/workflows/build.yml@v5.1.0
     with:
       c2a_dir: Examples/2nd_obc_user
       c2a_custom_setup: |