diff --git a/README.org b/README.org
index 72e290e..a2ef34b 100644
--- a/README.org
+++ b/README.org
@@ -187,6 +187,7 @@ let
 
 in mkShell {
   buildInputs = [
+    vi
     git
   ];
   shellHook = ''
diff --git a/shell.nix b/shell.nix
index a5ce9d8..25818e4 100644
--- a/shell.nix
+++ b/shell.nix
@@ -10,6 +10,7 @@ let
 
 in mkShell {
   buildInputs = [
+    vi
     git
   ];
   shellHook = ''