diff --git a/README.md b/README.md
index 8b8d426..d022ed5 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,15 @@ Go by Example book source.
 
 ### Reordering
 
-```bash
+```console
 $ mate tool/index.txt
 $ tool/renumber
 ```
+
+
+### Gofmt'ing
+
+```console
+$ tool/gofmt
+```
+
diff --git a/tool/gofmt b/tool/gofmt
new file mode 100644
index 0000000..2c83ba2
--- /dev/null
+++ b/tool/gofmt
@@ -0,0 +1,3 @@
+#!/bin/bash
+
+ls */*.go | xargs -n 1 gofmt -tabs=false -tabwidth=4 -w=true
diff --git a/tool/renumber b/tool/renumber
index ced5840..2f5e599 100755
--- a/tool/renumber
+++ b/tool/renumber
@@ -1,3 +1,3 @@
-#!/bin/sh
+#!/bin/bash
 
 exec go run tool/renumber.go