diff --git a/vendor/github.com/spf13/pflag/float64.go b/vendor/github.com/spf13/pflag/float64.go
new file mode 100644
index 0000000..04b5492
--- /dev/null
+++ b/vendor/github.com/spf13/pflag/float64.go
@@ -0,0 +1,84 @@
+package pflag
+
+import "strconv"
+
+// -- float64 Value
+type float64Value float64
+
+func newFloat64Value(val float64, p *float64) *float64Value {
+	*p = val
+	return (*float64Value)(p)
+}
+
+func (f *float64Value) Set(s string) error {
+	v, err := strconv.ParseFloat(s, 64)
+	*f = float64Value(v)
+	return err
+}
+
+func (f *float64Value) Type() string {
+	return "float64"
+}
+
+func (f *float64Value) String() string { return strconv.FormatFloat(float64(*f), 'g', -1, 64) }
+
+func float64Conv(sval string) (interface{}, error) {
+	return strconv.ParseFloat(sval, 64)
+}
+
+// GetFloat64 return the float64 value of a flag with the given name
+func (f *FlagSet) GetFloat64(name string) (float64, error) {
+	val, err := f.getFlagType(name, "float64", float64Conv)
+	if err != nil {
+		return 0, err
+	}
+	return val.(float64), nil
+}
+
+// Float64Var defines a float64 flag with specified name, default value, and usage string.
+// The argument p points to a float64 variable in which to store the value of the flag.
+func (f *FlagSet) Float64Var(p *float64, name string, value float64, usage string) {
+	f.VarP(newFloat64Value(value, p), name, "", usage)
+}
+
+// Float64VarP is like Float64Var, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Float64VarP(p *float64, name, shorthand string, value float64, usage string) {
+	f.VarP(newFloat64Value(value, p), name, shorthand, usage)
+}
+
+// Float64Var defines a float64 flag with specified name, default value, and usage string.
+// The argument p points to a float64 variable in which to store the value of the flag.
+func Float64Var(p *float64, name string, value float64, usage string) {
+	CommandLine.VarP(newFloat64Value(value, p), name, "", usage)
+}
+
+// Float64VarP is like Float64Var, but accepts a shorthand letter that can be used after a single dash.
+func Float64VarP(p *float64, name, shorthand string, value float64, usage string) {
+	CommandLine.VarP(newFloat64Value(value, p), name, shorthand, usage)
+}
+
+// Float64 defines a float64 flag with specified name, default value, and usage string.
+// The return value is the address of a float64 variable that stores the value of the flag.
+func (f *FlagSet) Float64(name string, value float64, usage string) *float64 {
+	p := new(float64)
+	f.Float64VarP(p, name, "", value, usage)
+	return p
+}
+
+// Float64P is like Float64, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) Float64P(name, shorthand string, value float64, usage string) *float64 {
+	p := new(float64)
+	f.Float64VarP(p, name, shorthand, value, usage)
+	return p
+}
+
+// Float64 defines a float64 flag with specified name, default value, and usage string.
+// The return value is the address of a float64 variable that stores the value of the flag.
+func Float64(name string, value float64, usage string) *float64 {
+	return CommandLine.Float64P(name, "", value, usage)
+}
+
+// Float64P is like Float64, but accepts a shorthand letter that can be used after a single dash.
+func Float64P(name, shorthand string, value float64, usage string) *float64 {
+	return CommandLine.Float64P(name, shorthand, value, usage)
+}