diff --git a/unum/vendor/github.com/mattn/go-colorable/colorable_others.go b/unum/vendor/github.com/mattn/go-colorable/colorable_others.go
new file mode 100644
index 0000000..52d6653
--- /dev/null
+++ b/unum/vendor/github.com/mattn/go-colorable/colorable_others.go
@@ -0,0 +1,24 @@
+// +build !windows
+
+package colorable
+
+import (
+	"io"
+	"os"
+)
+
+func NewColorable(file *os.File) io.Writer {
+	if file == nil {
+		panic("nil passed instead of *os.File to NewColorable()")
+	}
+
+	return file
+}
+
+func NewColorableStdout() io.Writer {
+	return os.Stdout
+}
+
+func NewColorableStderr() io.Writer {
+	return os.Stderr
+}