diff --git a/.dev.vars.example b/.dev.vars.example
index aae3fc5..4278157 100644
--- a/.dev.vars.example
+++ b/.dev.vars.example
@@ -1,3 +1,4 @@
 WEBHOOK_PROXY_URL=https://smee.io/new
 APP_WEBHOOK_SECRET=xxxxxx
 APP_ID=123456
+ENVIRONMENT=development | production
diff --git a/.github/workflows/worker-deploy.yml b/.github/workflows/worker-deploy.yml
index 41f3703..a5631a1 100644
--- a/.github/workflows/worker-deploy.yml
+++ b/.github/workflows/worker-deploy.yml
@@ -55,10 +55,12 @@ jobs:
             APP_ID
             APP_PRIVATE_KEY
             APP_WEBHOOK_SECRET
+            ENVIRONMENT
         env:
           APP_WEBHOOK_SECRET: ${{ secrets.APP_WEBHOOK_SECRET }}
           APP_ID: ${{ secrets.APP_ID }}
           APP_PRIVATE_KEY: ${{ secrets.APP_PRIVATE_KEY }}
+          ENVIRONMENT: ${{ secrets.ENVIRONMENT }}
 
       - name: Write Deployment URL to Summary
         run: |
diff --git a/src/github/types/env.ts b/src/github/types/env.ts
index 4eca283..3f73306 100644
--- a/src/github/types/env.ts
+++ b/src/github/types/env.ts
@@ -1,7 +1,7 @@
 import { Type as T, type Static } from "@sinclair/typebox";
 
 export const envSchema = T.Object({
-  ENVIRONMENT: T.Union([T.Literal("production"), T.Literal("development")]),
+  ENVIRONMENT: T.Union([T.Literal("production"), T.Literal("development")], { default: "development" }),
   APP_WEBHOOK_SECRET: T.String({ minLength: 1 }),
   APP_ID: T.String({ minLength: 1 }),
   APP_PRIVATE_KEY: T.String({ minLength: 1 }),