diff --git a/.github/workflows/diff.yaml b/.github/workflows/diff.yaml
new file mode 100644
index 0000000..e846d19
--- /dev/null
+++ b/.github/workflows/diff.yaml
@@ -0,0 +1,14 @@
+name: diff
+
+on: push
+
+jobs:
+  diff:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v4
+      - run: |
+          previous_commit=$(git rev-parse HEAD~1)
+          previous=$(git show $previous_commit:package.json | grep '"version"' | awk -F '"' '{print $4}')
+          current=$(git show HEAD:package.json | grep '"version"' | awk -F '"' '{print $4}')
+          echo "$previous_commit $previous $current"
diff --git a/.github/workflows/version.yaml b/.github/workflows/version.yaml
index 5a851cd..a232295 100644
--- a/.github/workflows/version.yaml
+++ b/.github/workflows/version.yaml
@@ -15,7 +15,7 @@ jobs:
           node-version: 20
       - id: version
         run: |
-          previous_commit=$(git rev-parse HEAD^)
+          previous_commit=$(git rev-parse HEAD~1)
           previous=$(git show $previous_commit:package.json | grep '"version"' | awk -F '"' '{print $4}')
           current=$(git show HEAD:package.json | grep '"version"' | awk -F '"' '{print $4}')
           echo "$previous $current"