diff --git a/01_Introduction.org b/01_Introduction.org
index f4f026ba..4c69c508 100644
--- a/01_Introduction.org
+++ b/01_Introduction.org
@@ -4,7 +4,7 @@
 * Introduction
 
 #+begin_warning
-Please note that this is the tutorial for [[https://github.com/leanprover/lean2][Lean2]], which allows the use of
+Please note that this is the tutorial for [[https://github.com/leanprover/lean2][Lean 2]], which allows the use of
 homotopy type theory (HoTT). It is /not/ the [[https://leanprover.github.io/introduction_to_lean][tutorial]] for the
 [[https://github.com/leanprover/lean][current version of Lean]].
 #+end_warning
diff --git a/README.md b/README.md
index 50d7793e..0b90c47e 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ Lean Tutorial
  - Web : https://leanprover.github.io/tutorial
  - PDF : https://leanprover.github.io/tutorial/tutorial.pdf
 
-Please note that this is the tutorial for [Lean2](https://github.com/leanprover/lean2), which allows the use of homotopy type theory (HoTT). It is /not/ the [tutorial](https://leanprover.github.io/introduction_to_lean) for the [current version of Lean](https://github.com/leanprover/lean).
+Please note that this is the tutorial for [Lean 2](https://github.com/leanprover/lean2), which allows the use of homotopy type theory (HoTT). It is /not/ the [tutorial](https://leanprover.github.io/introduction_to_lean) for the [current version of Lean](https://github.com/leanprover/lean).
 
 How to Build
 ------------