diff --git a/README.md b/README.md
index 636ed7c3..63e8510c 100644
--- a/README.md
+++ b/README.md
@@ -45,10 +45,10 @@ pip install pytest
 pip install pytest sqlalchemy
 
 # for chapter 4+5
-pip install requirements.txt
+pip install -r requirements.txt
 
 # for chapter 6+
-pip install requirements.txt
+pip install -r requirements.txt
 pip install -e src/
 ```