diff --git a/README.md b/README.md
index 98a2a7ad0b92d17a977a00cd697e8cb01366b162..7dec3e148ac3ffde0993d26d48525e3dccd5e3d5 100644
--- a/README.md
+++ b/README.md
@@ -19,12 +19,14 @@
 
 1. Install Docker and its dependencies.
 
-2. Clone the project and cd into the directory of the project, then run:
+2. Install Elasticsearch.
+
+3. Clone the project and cd into the directory of the project, then run:
     ```
     sudo docker build -t ibi_horse .
     ```
 
-3. After the build, run:
+4. After the build, run:
     ```
     sudo docker run --network host ibi_horse
     ```