diff --git a/README.md b/README.md
index 244cb35..02ac163 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 ## Initialize
 
-In `conf.py` add `extensions += ['sphinx_prompt']`.
+In `conf.py` add `extensions += ['sphinx-prompt']`.
 
 ## Syntax