diff --git a/docs/backend/speculative_decoding.ipynb b/docs/backend/speculative_decoding.ipynb
index d69436eed..273d943d1 100644
--- a/docs/backend/speculative_decoding.ipynb
+++ b/docs/backend/speculative_decoding.ipynb
@@ -8,10 +8,11 @@
     "\n",
     "SGLang now provides an EAGLE-based speculative decoding option. The implementation aims to maximize speed and efficiency and is considered to be among the fastest in open-source LLM engines.\n",
     "\n",
+    "**Note:** Currently, Speculative Decoding in SGLang does not support radix cache.\n",
+    "\n",
     "To run the following tests or benchmarks, you also need to install [**cutex**](https://pypi.org/project/cutex/):  \n",
-    "> ```bash\n",
-    "> pip install cutex\n",
-    "> ```\n",
+    "\n",
+    "`pip install cutex`\n",
     "\n",
     "### Performance Highlights\n",
     "\n",