README.md in fluent-plugin-netflow-1.0.2 vs README.md in fluent-plugin-netflow-1.1.0

@@ -63,13 +63,16 @@
 
 **definitions**
 
 YAML file containing Netflow field definitions to overfide pre-defined templates. Example is like below
 
-    ---
-    4:          # field value
-    - :uint8    # field length
-    - :protocol # field type
+```yaml
+---
+option:
+  4:          # field value
+  - :uint8    # field length
+  - :protocol # field type
+```
 
 
 ## Performance Evaluation
 
 Benchmark for v5 protocol on Macbook Air (Early 2014, 1.7 GHz Intel Core i7):