diff --git a/README.md b/README.md
index 6a0fa51..8b1a927 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ where certain fitted parameters are shared between samples depending on another
 constant property of the samples. For example, if two samples have the same
 "batch" parameter, then they should have the same "signal" parameter.
 
-# Usage
+## Usage
 
 ```python
 from fit_framework import fit