diff --git a/action.yml b/action.yml
index 61b125a0..044b818d 100644
--- a/action.yml
+++ b/action.yml
@@ -7,8 +7,7 @@ inputs:
     default: 'v0.1.0-alpha'
   installer-uri:
     description: 'Alternative installer script to use'
-    required: true
-    default: "${{ github.action_path }}/install.ts"
+    required: false
   sync:
     description: 'Disable to skip syncing ports'
     required: true
@@ -18,8 +17,10 @@ runs:
   steps:
     - id: install-ghjk
       shell: bash
+      env:
+        DEFAULT_INSTALL_URL: "${{ github.action_path }}/install.ts"
       run: |
-        deno run -A ${{ inputs.installer-uri }}
+        deno run -A ${${{ inputs.installer-uri }}:-$DEFAULT_INSTALL_URL}
         echo "$HOME/.local/bin" >> $GITHUB_PATH
     - id: sync-ghjk
       shell: bash