diff --git a/01_intro.md b/01_intro.md
index e358026..06c4c65 100644
--- a/01_intro.md
+++ b/01_intro.md
@@ -133,7 +133,7 @@ Root-finding
 Bisection and Newton's method.
 
 Convergence rates:
-  - linearly
+  - linear
   - superlinear
   - quadratic