diff --git a/apps/sim/package.json b/apps/sim/package.json
index ac1c815075..de5a19ecec 100644
--- a/apps/sim/package.json
+++ b/apps/sim/package.json
@@ -16,9 +16,8 @@
     "load:workflow:baseline": "BASE_URL=${BASE_URL:-http://localhost:3000} WARMUP_DURATION=${WARMUP_DURATION:-10} WARMUP_RATE=${WARMUP_RATE:-2} PEAK_RATE=${PEAK_RATE:-8} HOLD_DURATION=${HOLD_DURATION:-20} bunx artillery run scripts/load/workflow-concurrency.yml",
     "load:workflow:waves": "BASE_URL=${BASE_URL:-http://localhost:3000} WAVE_ONE_DURATION=${WAVE_ONE_DURATION:-10} WAVE_ONE_RATE=${WAVE_ONE_RATE:-6} QUIET_DURATION=${QUIET_DURATION:-5} WAVE_TWO_DURATION=${WAVE_TWO_DURATION:-15} WAVE_TWO_RATE=${WAVE_TWO_RATE:-8} WAVE_THREE_DURATION=${WAVE_THREE_DURATION:-20} WAVE_THREE_RATE=${WAVE_THREE_RATE:-10} bunx artillery run scripts/load/workflow-waves.yml",
     "load:workflow:isolation": "BASE_URL=${BASE_URL:-http://localhost:3000} ISOLATION_DURATION=${ISOLATION_DURATION:-30} TOTAL_RATE=${TOTAL_RATE:-9} WORKSPACE_A_WEIGHT=${WORKSPACE_A_WEIGHT:-8} WORKSPACE_B_WEIGHT=${WORKSPACE_B_WEIGHT:-1} bunx artillery run scripts/load/workflow-isolation.yml",
-    "build": "bun run build:pptx-worker && bun run build:worker && next build",
+    "build": "bun run build:pptx-worker && next build",
     "build:pptx-worker": "bun build ./lib/execution/pptx-worker.cjs --target=node --format=cjs --outfile ./dist/pptx-worker.cjs",
-    "build:worker": "bun build ./worker/index.ts --target=node --format=esm --splitting --outdir ./dist/worker --external isolated-vm",
     "start": "next start",
     "worker": "NODE_ENV=production bun run worker/index.ts",
     "prepare": "cd ../.. && bun husky",
diff --git a/docker-compose.local.yml b/docker-compose.local.yml
index 354a77d139..8b874acee8 100644
--- a/docker-compose.local.yml
+++ b/docker-compose.local.yml
@@ -71,7 +71,7 @@ services:
     build:
       context: .
       dockerfile: docker/app.Dockerfile
-    command: ['bun', 'apps/sim/dist/worker/index.js']
+    command: ['bun', 'apps/sim/worker/index.ts']
     restart: unless-stopped
     deploy:
       resources:
diff --git a/docker-compose.prod.yml b/docker-compose.prod.yml
index 5f8f8bc9db..e7000f0688 100644
--- a/docker-compose.prod.yml
+++ b/docker-compose.prod.yml
@@ -42,7 +42,7 @@ services:
 
   sim-worker:
     image: ghcr.io/simstudioai/simstudio:latest
-    command: ['bun', 'apps/sim/dist/worker/index.js']
+    command: ['bun', 'apps/sim/worker/index.ts']
     restart: unless-stopped
     deploy:
       resources:
diff --git a/docker/app.Dockerfile b/docker/app.Dockerfile
index b5e2f14457..54791300d5 100644
--- a/docker/app.Dockerfile
+++ b/docker/app.Dockerfile
@@ -105,6 +105,12 @@ COPY --from=builder --chown=nextjs:nodejs /app/apps/sim/public ./apps/sim/public
 COPY --from=builder --chown=nextjs:nodejs /app/apps/sim/.next/standalone ./
 COPY --from=builder --chown=nextjs:nodejs /app/apps/sim/.next/static ./apps/sim/.next/static
 
+# Copy the full dependency tree and app source so the BullMQ worker can run from source.
+# The standalone server continues to use server.js; the worker uses bun on worker/index.ts.
+COPY --from=deps --chown=nextjs:nodejs /app/node_modules ./node_modules
+COPY --from=builder --chown=nextjs:nodejs /app/apps/sim ./apps/sim
+COPY --from=builder --chown=nextjs:nodejs /app/packages ./packages
+
 # Copy isolated-vm native module (compiled for Node.js in deps stage)
 COPY --from=deps --chown=nextjs:nodejs /app/node_modules/isolated-vm ./node_modules/isolated-vm
 
@@ -114,9 +120,6 @@ COPY --from=builder --chown=nextjs:nodejs /app/apps/sim/lib/execution/isolated-v
 # Copy the bundled PPTX worker artifact
 COPY --from=builder --chown=nextjs:nodejs /app/apps/sim/dist/pptx-worker.cjs ./apps/sim/dist/pptx-worker.cjs
 
-# Copy the bundled BullMQ worker (self-contained ESM bundle, only isolated-vm is external)
-COPY --from=builder --chown=nextjs:nodejs /app/apps/sim/dist/worker ./apps/sim/dist/worker
-
 # Guardrails setup with pip caching
 COPY --from=builder --chown=nextjs:nodejs /app/apps/sim/lib/guardrails/requirements.txt ./apps/sim/lib/guardrails/requirements.txt
 COPY --from=builder --chown=nextjs:nodejs /app/apps/sim/lib/guardrails/validate_pii.py ./apps/sim/lib/guardrails/validate_pii.py
diff --git a/helm/sim/templates/deployment-worker.yaml b/helm/sim/templates/deployment-worker.yaml
index adf7b9c284..75fa6e88c1 100644
--- a/helm/sim/templates/deployment-worker.yaml
+++ b/helm/sim/templates/deployment-worker.yaml
@@ -37,7 +37,7 @@ spec:
         - name: worker
           image: {{ include "sim.image" (dict "context" . "image" .Values.worker.image) }}
           imagePullPolicy: {{ .Values.worker.image.pullPolicy }}
-          command: ["bun", "apps/sim/dist/worker/index.js"]
+          command: ["bun", "apps/sim/worker/index.ts"]
           ports:
             - name: health
               containerPort: {{ .Values.worker.healthPort }}