diff --git a/README.md b/README.md
index a34e606..d9a7adb 100644
--- a/README.md
+++ b/README.md
@@ -16,6 +16,7 @@ Languages:
 - Golang
 - Make
 - Python
+- Protobuf
 - Shell
 - YAML
 
@@ -30,7 +31,7 @@ brew install liamawhite/licenser/licenser
 To install on Ubuntu/Debian, use `wget`.
 
 ```sh
-wget -c https://github.com/liamawhite/licenser/releases/download/v0.3.3/licenser_0.3.3_Linux_x86_64.tar.gz -O - | sudo tar -xz -C /usr/bin
+wget -c https://github.com/liamawhite/licenser/releases/download/v${VERSION}/licenser_${VERSION}_Linux_x86_64.tar.gz -O - | sudo tar -xz -C /usr/bin
 ```
 
 To install on other platforms, download from the [releases section](https://github.com/liamawhite/licenser/releases).
diff --git a/pkg/file/mutator.go b/pkg/file/mutator.go
index ed67904..02fb330 100644
--- a/pkg/file/mutator.go
+++ b/pkg/file/mutator.go
@@ -136,6 +136,8 @@ func identifyLanguageStyle(path string) *languageStyle {
 		return commentStyles["golang"]
 	case ".py":
 		return commentStyles["python"]
+	case ".proto":
+		return commentStyles["protobuf"]
 	case ".sh", ".patch":
 		return commentStyles["shell"]
 	case ".yaml", ".yml":
diff --git a/pkg/file/style.go b/pkg/file/style.go
index 43ab572..301ac4e 100644
--- a/pkg/file/style.go
+++ b/pkg/file/style.go
@@ -28,12 +28,13 @@ type languageStyle struct {
 }
 
 var commentStyles = map[string]*languageStyle{
-	"bazel":  &languageStyle{isBlock: false, comment: "#"},
-	"c":      &languageStyle{isBlock: false, comment: "//"},
-	"docker": &languageStyle{isBlock: false, comment: "#"},
-	"golang": &languageStyle{isBlock: false, comment: "//"},
-	"make":   &languageStyle{isBlock: false, comment: "#"},
-	"python": &languageStyle{isBlock: false, comment: "#"},
-	"shell":  &languageStyle{isBlock: false, comment: "#"},
-	"yaml":   &languageStyle{isBlock: false, comment: "#"},
+	"bazel":    &languageStyle{isBlock: false, comment: "#"},
+	"c":        &languageStyle{isBlock: false, comment: "//"},
+	"docker":   &languageStyle{isBlock: false, comment: "#"},
+	"golang":   &languageStyle{isBlock: false, comment: "//"},
+	"make":     &languageStyle{isBlock: false, comment: "#"},
+	"protobuf": &languageStyle{isBlock: false, comment: "//"},
+	"python":   &languageStyle{isBlock: false, comment: "#"},
+	"shell":    &languageStyle{isBlock: false, comment: "#"},
+	"yaml":     &languageStyle{isBlock: false, comment: "#"},
 }