diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f2d844b..4eee33e 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -75,7 +75,7 @@ jobs:
         egress-policy: audit
 
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Setup MPI
       id:   setup-mpi
@@ -159,7 +159,7 @@ jobs:
         egress-policy: audit
 
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Setup MPICH
       id:   setup1
@@ -201,7 +201,7 @@ jobs:
         egress-policy: audit
 
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Setup MPICH
       id:   setup1
@@ -236,7 +236,7 @@ jobs:
         egress-policy: audit
 
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Setup MPICH
       id:   setup1
@@ -282,7 +282,7 @@ jobs:
         egress-policy: audit
 
     - name: Checkout
-      uses: actions/checkout@v4
+      uses: actions/checkout@v5
 
     - name: Setup Intel MPI
       id:   setup1