diff --git a/README.md b/README.md
index ff7eb24..db2d221 100644
--- a/README.md
+++ b/README.md
@@ -70,7 +70,7 @@ https://gist.github.com/olistik/2627011
 # Documents
 - Generate class diagrams for controllers and models
 
-        sudo apt get install graphviz # if you didn't install graph-viz
+        sudo apt-get install graphviz # if you didn't install graph-viz
         rake diagram:all
 
 # Performance Testing