diff --git a/.mutant.yml b/.mutant.yml
new file mode 100644
index 0000000..a0cfc23
--- /dev/null
+++ b/.mutant.yml
@@ -0,0 +1,10 @@
+includes:
+  - "lib"
+requires:
+  - "humanize"
+integration:
+  name: "rspec"
+matcher:
+  subjects:
+    - "Humanize"
+usage: "opensource"
diff --git a/README.markdown b/README.markdown
index 86452a3..4a97962 100644
--- a/README.markdown
+++ b/README.markdown
@@ -150,7 +150,7 @@ Currently supported locales:
 
 Install development dependencies by running `bundle install`.
 
-You can run mutation testing by calling `bin/run_mutant`.
+You can run mutation testing by calling `bundle exec mutant run`.
 
 ## Credits
 
diff --git a/bin/run_mutant b/bin/run_mutant
deleted file mode 100755
index f7b8a01..0000000
--- a/bin/run_mutant
+++ /dev/null
@@ -1,3 +0,0 @@
-#!/bin/bash
-
-mutant --include lib --require humanize --use rspec Humanize