diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 708e699..47affcd 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -61,3 +61,26 @@ jobs:
           echo Output version is empty!
           exit 1
         fi
+  test-action-0-4-0:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v3
+      with:
+        fetch-depth: 0
+    - id: git-describe-semver
+      uses: choffmeister/git-describe-semver@main
+      with:
+        version:  0.4.0
+        dir: .
+        fallback: v0.0.0-init
+        drop-prefix: true
+        prerelease-prefix: prefix
+        prerelease-suffix: suffix
+        prerelease-timestamped: true
+        next-release: major
+    - name: Verify output
+      run: |
+        if [[ -z "${{ steps.git-describe-semver.outputs.version }}" ]]; then
+          echo Output version is empty!
+          exit 1
+        fi
diff --git a/action.yaml b/action.yaml
index 31fc98c..9de83e7 100644
--- a/action.yaml
+++ b/action.yaml
@@ -52,10 +52,10 @@ runs:
         git-describe-semver \
           ${{ format('--dir="{0}"', inputs.dir) }} \
           ${{ format('--fallback="{0}"', inputs.fallback) }} \
-          ${{ format('--drop-prefix="{0}"', inputs.drop-prefix) }} \
+          ${{ inputs.drop-prefix == 'true' && format('--drop-prefix') || '' }} \
           ${{ format('--prerelease-prefix="{0}"', inputs.prerelease-prefix) }} \
           ${{ format('--prerelease-suffix="{0}"', inputs.prerelease-suffix) }} \
-          ${{ format('--prerelease-timestamped="{0}"', inputs.prerelease-timestamped) }} \
+          ${{ inputs.inputs.prerelease-timestamped == 'true' && format('--prerelease-timestamped') || '' }} \
           ${{ inputs.next-release != '' && format('--next-release="{0}"', inputs.next-release) || '' }} \
           --format="version=<version>" \
           $GITHUB_OUTPUT