diff --git a/README.md b/README.md
index abd1f39ee885e918ee24016b8c792eaa4a06c49f..39df08290e2eda543479a15b31753680a397c709 100644
--- a/README.md
+++ b/README.md
@@ -38,9 +38,13 @@ Install
     
     unzip plugin to folder `your-es-root/plugins/`
 
-* optional 2 - use elasticsearch-plugin to install ( version > v5.5.1 ):
+* optional 2 - use elasticsearch-plugin to install ( supported from version v5.5.1 ):
 
-    `./bin/elasticsearch-plugin install https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v6.2.3/elasticsearch-analysis-ik-6.2.3.zip`
+    ```
+    ./bin/elasticsearch-plugin install https://github.com/medcl/elasticsearch-analysis-ik/releases/download/v6.2.3/elasticsearch-analysis-ik-6.2.3.zip
+    ```
+
+   NOTE: replace `6.2.3` to your own elasticsearch version
 
 2.restart elasticsearch