diff --git a/docs/quick_start_en.md b/docs/quick_start_en.md
index 8eea412a07d63fb009c58d9ce8395e58c122705c..322523b851e23c9eb72a5f1477e2d1a5cdfdf2ce 100644
--- a/docs/quick_start_en.md
+++ b/docs/quick_start_en.md
@@ -40,7 +40,7 @@ with logw.mode("train") as logger:
 Next we create a `Scalar` component. Each component needs a tag. A tag can be a string of any length.
 For example, `layer/classification/error`.
 
-```
+```python
 # create scalars in mode train and test.
 with logw.mode('train') as logger:
     scalar0 = logger.scalar("scratch/scalar")