diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 378b902..3e4e3fb 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -13,11 +13,11 @@ jobs:
     steps:
     - name: Checkout files
       id:   checkout-files
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
     - name: Check the cached arm-none-eabi-gcc compiler
       id:   cache-toolchain
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       env:
         cache-name: cache-toolchain-10-2020-q4
       with:
diff --git a/.github/workflows/sim.yml b/.github/workflows/sim.yml
index 03c9791..c832547 100644
--- a/.github/workflows/sim.yml
+++ b/.github/workflows/sim.yml
@@ -13,11 +13,11 @@ jobs:
     steps:
     - name: Checkout files
       id:   checkout-files
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
     - name: Check the cached python downloads
       id:   cache-modules
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       env:
         cache-name: cache-toolchain
       with: