diff --git a/astro.config.mjs b/astro.config.mjs
index c08d3c3..af99936 100644
--- a/astro.config.mjs
+++ b/astro.config.mjs
@@ -35,5 +35,29 @@ export default defineConfig({
         '@': path.resolve(__dirname, 'src'),
       },
     },
+    build: {
+      chunkSizeWarningLimit: 3000,
+      rollupOptions: {
+        output: {
+          manualChunks(id) {
+            // Create vendor chunks for large dependencies
+            if (id.includes('node_modules')) {
+              // Mermaid and its dependencies
+              if (id.includes('mermaid')
+                || id.includes('cytoscape')
+                || id.includes('dagre')
+                || id.includes('khroma')
+                || id.includes('dayjs')
+                || id.includes('uuid')
+                || id.includes('lodash')
+                || id.includes('d3-')) {
+                return 'vendor-mermaid'
+              }
+              // Other vendors can be grouped here if needed
+            }
+          },
+        },
+      },
+    },
   },
 })