diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index ba3b8742..0148b9ed 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -76,11 +76,11 @@ jobs:
             tools/
             zephyr/
             bootloader/
-          key: 3-${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('app/west.yml') }}
+          key: 4-${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('app/west.yml') }}
           restore-keys: |
-            3-${{ runner.os }}-build-${{ env.cache-name }}-
-            3-${{ runner.os }}-build-
-            3-${{ runner.os }}-
+            4-${{ runner.os }}-build-${{ env.cache-name }}-
+            4-${{ runner.os }}-build-
+            4-${{ runner.os }}-
         timeout-minutes: 2
         continue-on-error: true
       - name: West init
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 9e594d3c..a9cba242 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -32,11 +32,11 @@ jobs:
             tools/
             zephyr/
             bootloader/
-          key: 3-${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('app/west.yml') }}
+          key: 4-${{ runner.os }}-build-${{ env.cache-name }}-${{ hashFiles('app/west.yml') }}
           restore-keys: |
-            3-${{ runner.os }}-build-${{ env.cache-name }}-
-            3-${{ runner.os }}-build-
-            3-${{ runner.os }}-
+            4-${{ runner.os }}-build-${{ env.cache-name }}-
+            4-${{ runner.os }}-build-
+            4-${{ runner.os }}-
         timeout-minutes: 2
         continue-on-error: true
       - name: West init