diff --git a/README.md b/README.md
index 9a02b8d..7d71cfd 100644
--- a/README.md
+++ b/README.md
@@ -43,4 +43,4 @@ Extensions | Tools
 .png .jpg .gif .bmp .ppm .tiff .tga | [pil](http://python-pillow.github.io/) • [pil_half](http://python-pillow.github.io/)
 .bash .sh .dash .ksh | [shellcheck](http://hackage.haskell.org/package/ShellCheck)
 .go | [gofmt](https://golang.org) • [go_vet](https://golang.org) • [golint](https://github.com/golang/lint) • [godoc](http://golang.org/x/tools)
-.yaml | [yamllint](https://github.com/adrienverge/yamllint)
+.yaml .yml | [yamllint](https://github.com/adrienverge/yamllint)
diff --git a/vigil/tools.toml b/vigil/tools.toml
index 156674c..838e74d 100644
--- a/vigil/tools.toml
+++ b/vigil/tools.toml
@@ -21,7 +21,7 @@ tools_for_extensions = [
    [["png", "jpg", "gif", "bmp", "ppm", "tiff", "tga"], ["pil", "pil_half"]],
    [["bash", "sh", "dash", "ksh"], ["shellcheck"]],
    [["go"], ["gofmt", "go_vet", "golint", "godoc"]],
-   [["yaml"], ["yamllint"]]]
+   [["yaml", "yml"], ["yamllint"]]]
 
 
 # Tool template: