diff --git a/README.md b/README.md
index 5edbc94..97fa915 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v1
-      - uses: plotly/de-deploy@v2
+      - uses: plotly/de-deploy@main
         with:
           DE_HOST: ${{ secrets.DE_HOST }}
           DE_USERNAME: ${{ secrets.DE_USERNAME }}
@@ -55,6 +55,7 @@ The inputs this action uses are:
 | `create_redis` | `false` | None | True to create a Redis instance for the app. |
 | `create_postgres` | `false` | None | True to create a Postgres instance for the app. |
 | `create_persistent_filesystem` | `false` | None | True to create a persistent filesystem for the app. |
+| `env_vars` | `false` | None | Environment variables to add. Separate multiple variables with a space. Example: `env_vars: "FOO=BAR FOO_SECRET=${{ secrets.FOO_SECRET }}"` |
 
 ### Preview deploy on pull request
 This action will deploy branches using the `on: pull_request: types: ['opened', 'edited', 'synchronize', 'closed']` trigger as `https://${DE_HOST}/${APP_NAME}-${event_number}`, e.g. if you are deploying an app called `inventory-analytics` to `example.plotly.host` and your PR number is `15`, the deploy preview would be available at `https://example.plotly.host/inventory-analytics-15` and would be redeployed on every new commit to that PR.
diff --git a/action.yml b/action.yml
index 90cbfe7..4bc8925 100644
--- a/action.yml
+++ b/action.yml
@@ -28,7 +28,7 @@ inputs:
   group_viewers:
     description: User groups to add as viewers to the app. If not provided, no groups will be added.
     required: false
-    type: strong
+    type: string
   group_co_owners:
     description: User groups to add as co-owners to the app. If not provided, no groups will be added.
     type: boolean
@@ -45,9 +45,7 @@ inputs:
     description: True to create a persistent filesystem for the app.
     type: boolean
     required: false
-  
-  
-    
+
 runs:
   using: composite
   steps:
@@ -101,6 +99,11 @@ runs:
           -H "X-GitHub-Api-Version: 2022-11-28"\
           https://api.github.com/repos/${{ github.repository }}/statuses/${{github.event.pull_request.head.sha || github.sha}}\
           -d '{"state":"success","target_url":"https://${{ inputs.DE_HOST }}/apps/${{ steps.app_name.outputs.app_name }}","description":"App manager ready!","context":"deploy/${{ steps.app_name.outputs.app_name }}"}'
+      - name: Set environment variables
+        run: |
+          name=${{ matrix.env_var.name }}
+          value=${{ matrix.env_var.value }}
+          de --no-keyfile apps update --name ${{ steps.app_name.outputs.app_name }} --add-environment-variable "$name=$value"
     - name: Create Redis
       shell: bash
       if: ${{ inputs.create_redis }}
@@ -154,7 +157,6 @@ runs:
         DASH_ENTERPRISE_HOST: ${{inputs.DE_HOST}}
         DASH_ENTERPRISE_USERNAME: ${{inputs.DE_USERNAME}}
 
-
 branding:
   icon: activity
   color: purple