diff --git a/.github/workflows/actions/terraform-deploy/action.yml b/.github/workflows/actions/terraform-deploy/action.yml
index b2eff64..685a0ac 100644
--- a/.github/workflows/actions/terraform-deploy/action.yml
+++ b/.github/workflows/actions/terraform-deploy/action.yml
@@ -16,7 +16,7 @@ inputs:
     required: true
   lambda-image-tag:
     description: "Tag of the Lambda image (e.g., GitHub SHA)"
-    required: true
+    required: false
 
 runs:
   using: "composite"
@@ -41,8 +41,12 @@ runs:
     - name: Terraform Plan
       working-directory: ${{ inputs.working_directory }}
       shell: bash
-      run: terraform plan -out=tfplan -var="lambda_image_tag=${{ inputs.lambda-image-tag }}"
-
+      run: |
+        if [ -n "${{ inputs.lambda-image-tag }}" ]; then
+          terraform plan -out=tfplan -var="lambda_image_tag=${{ inputs.lambda-image-tag }}"
+        else
+          terraform plan -out=tfplan
+        fi
 
     - name: Terraform Apply
       working-directory: ${{ inputs.working_directory }}