diff --git a/examples/openui-chat/Dockerfile b/examples/openui-chat/Dockerfile
index b3a36dfe1..d6d5be06b 100644
--- a/examples/openui-chat/Dockerfile
+++ b/examples/openui-chat/Dockerfile
@@ -17,6 +17,7 @@ COPY pnpm-workspace.yaml package.json pnpm-lock.yaml tsconfig.json ./
 COPY packages/openui-cli/package.json ./packages/openui-cli/
 COPY packages/react-ui/package.json ./packages/react-ui/
 COPY packages/react-headless/package.json ./packages/react-headless/
+COPY packages/lang-core/package.json ./packages/lang-core/
 COPY packages/react-lang/package.json ./packages/react-lang/
 COPY examples/openui-chat/package.json ./examples/openui-chat/
 
@@ -26,20 +27,20 @@ RUN --mount=type=cache,id=pnpm-store,target=/root/.local/share/pnpm/store \
 COPY packages/openui-cli ./packages/openui-cli
 COPY packages/react-ui ./packages/react-ui
 COPY packages/react-headless ./packages/react-headless
+COPY packages/lang-core ./packages/lang-core
 COPY packages/react-lang ./packages/react-lang
 COPY examples/openui-chat ./examples/openui-chat
 
 RUN pnpm --filter @openuidev/cli build
 RUN pnpm --filter @openuidev/react-ui build
 RUN pnpm --filter @openuidev/react-headless build
+RUN pnpm --filter @openuidev/lang-core build
 RUN pnpm --filter @openuidev/react-lang build
 
 WORKDIR /app/examples/openui-chat
 RUN node /app/packages/openui-cli/dist/index.js generate src/library.ts --out src/generated/system-prompt.txt \
   && pnpm build
 
-
-
 # --------------------------------------------------
 # Runtime stage
 # --------------------------------------------------
@@ -55,7 +56,7 @@ ENV PORT=3000 HOSTNAME=0.0.0.0
 
 RUN addgroup -S nodejs && adduser -S nextjs -G nodejs
 USER nextjs
- 
+
 # Copy full standalone output to avoid brittle partial-copy assumptions
 COPY --from=builder --chown=nextjs:nodejs /app/examples/openui-chat/.next/standalone ./
 
@@ -70,4 +71,4 @@ EXPOSE 3000
 HEALTHCHECK --interval=30s --timeout=3s --start-period=5s --retries=3 \
   CMD node -e "fetch('http://127.0.0.1:3000').then((r)=>process.exit(r.ok?0:1)).catch(()=>process.exit(1))"
 
-CMD ["node", "examples/openui-chat/server.js"]
\ No newline at end of file
+CMD ["node", "examples/openui-chat/server.js"]