diff --git a/Gopkg.lock b/Gopkg.lock
index 14a9df6..7b213e3 100644
--- a/Gopkg.lock
+++ b/Gopkg.lock
@@ -46,12 +46,12 @@
   version = "v0.0.3"
 
 [[projects]]
-  digest = "1:e3707aeaccd2adc89eba6c062fec72116fe1fc1ba71097da85b4d8ae1668a675"
+  digest = "1:9d8420bbf131d1618bde6530af37c3799340d3762cc47210c1d9532a4c3a2779"
   name = "github.com/spf13/pflag"
   packages = ["."]
   pruneopts = "NUT"
-  revision = "9a97c102cda95a86cec2345a6f09f55a939babf5"
-  version = "v1.0.2"
+  revision = "298182f68c66c05229eb03ac171abe6e309ee79a"
+  version = "v1.0.3"
 
 [[projects]]
   branch = "master"
@@ -63,7 +63,7 @@
     "webdav/internal/xml",
   ]
   pruneopts = "NUT"
-  revision = "26e67e76b6c3f6ce91f7c52def5af501b4e0f3a2"
+  revision = "49bb7cea24b1df9410e1712aa6433dae904ff66a"
 
 [solve-meta]
   analyzer-name = "dep"
diff --git a/Gopkg.toml b/Gopkg.toml
index 4f9f52e..1e69044 100644
--- a/Gopkg.toml
+++ b/Gopkg.toml
@@ -27,7 +27,7 @@
 
 [[constraint]]
   name = "github.com/Luzifer/go_helpers"
-  version = "2.8.0"
+  version = "^2.8.0"
 
 [[constraint]]
   branch = "master"
diff --git a/vendor/github.com/spf13/pflag/flag.go b/vendor/github.com/spf13/pflag/flag.go
index 5cc710c..9beeda8 100644
--- a/vendor/github.com/spf13/pflag/flag.go
+++ b/vendor/github.com/spf13/pflag/flag.go
@@ -925,13 +925,16 @@ func stripUnknownFlagValue(args []string) []string {
 	}
 
 	first := args[0]
-	if first[0] == '-' {
+	if len(first) > 0 && first[0] == '-' {
 		//--unknown --next-flag ...
 		return args
 	}
 
 	//--unknown arg ... (args will be arg ...)
-	return args[1:]
+	if len(args) > 1 {
+		return args[1:]
+	}
+	return nil
 }
 
 func (f *FlagSet) parseLongArg(s string, args []string, fn parseFunc) (a []string, err error) {
diff --git a/vendor/github.com/spf13/pflag/string_to_int.go b/vendor/github.com/spf13/pflag/string_to_int.go
new file mode 100644
index 0000000..5ceda39
--- /dev/null
+++ b/vendor/github.com/spf13/pflag/string_to_int.go
@@ -0,0 +1,149 @@
+package pflag
+
+import (
+	"bytes"
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+// -- stringToInt Value
+type stringToIntValue struct {
+	value   *map[string]int
+	changed bool
+}
+
+func newStringToIntValue(val map[string]int, p *map[string]int) *stringToIntValue {
+	ssv := new(stringToIntValue)
+	ssv.value = p
+	*ssv.value = val
+	return ssv
+}
+
+// Format: a=1,b=2
+func (s *stringToIntValue) Set(val string) error {
+	ss := strings.Split(val, ",")
+	out := make(map[string]int, len(ss))
+	for _, pair := range ss {
+		kv := strings.SplitN(pair, "=", 2)
+		if len(kv) != 2 {
+			return fmt.Errorf("%s must be formatted as key=value", pair)
+		}
+		var err error
+		out[kv[0]], err = strconv.Atoi(kv[1])
+		if err != nil {
+			return err
+		}
+	}
+	if !s.changed {
+		*s.value = out
+	} else {
+		for k, v := range out {
+			(*s.value)[k] = v
+		}
+	}
+	s.changed = true
+	return nil
+}
+
+func (s *stringToIntValue) Type() string {
+	return "stringToInt"
+}
+
+func (s *stringToIntValue) String() string {
+	var buf bytes.Buffer
+	i := 0
+	for k, v := range *s.value {
+		if i > 0 {
+			buf.WriteRune(',')
+		}
+		buf.WriteString(k)
+		buf.WriteRune('=')
+		buf.WriteString(strconv.Itoa(v))
+		i++
+	}
+	return "[" + buf.String() + "]"
+}
+
+func stringToIntConv(val string) (interface{}, error) {
+	val = strings.Trim(val, "[]")
+	// An empty string would cause an empty map
+	if len(val) == 0 {
+		return map[string]int{}, nil
+	}
+	ss := strings.Split(val, ",")
+	out := make(map[string]int, len(ss))
+	for _, pair := range ss {
+		kv := strings.SplitN(pair, "=", 2)
+		if len(kv) != 2 {
+			return nil, fmt.Errorf("%s must be formatted as key=value", pair)
+		}
+		var err error
+		out[kv[0]], err = strconv.Atoi(kv[1])
+		if err != nil {
+			return nil, err
+		}
+	}
+	return out, nil
+}
+
+// GetStringToInt return the map[string]int value of a flag with the given name
+func (f *FlagSet) GetStringToInt(name string) (map[string]int, error) {
+	val, err := f.getFlagType(name, "stringToInt", stringToIntConv)
+	if err != nil {
+		return map[string]int{}, err
+	}
+	return val.(map[string]int), nil
+}
+
+// StringToIntVar defines a string flag with specified name, default value, and usage string.
+// The argument p points to a map[string]int variable in which to store the values of the multiple flags.
+// The value of each argument will not try to be separated by comma
+func (f *FlagSet) StringToIntVar(p *map[string]int, name string, value map[string]int, usage string) {
+	f.VarP(newStringToIntValue(value, p), name, "", usage)
+}
+
+// StringToIntVarP is like StringToIntVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) StringToIntVarP(p *map[string]int, name, shorthand string, value map[string]int, usage string) {
+	f.VarP(newStringToIntValue(value, p), name, shorthand, usage)
+}
+
+// StringToIntVar defines a string flag with specified name, default value, and usage string.
+// The argument p points to a map[string]int variable in which to store the value of the flag.
+// The value of each argument will not try to be separated by comma
+func StringToIntVar(p *map[string]int, name string, value map[string]int, usage string) {
+	CommandLine.VarP(newStringToIntValue(value, p), name, "", usage)
+}
+
+// StringToIntVarP is like StringToIntVar, but accepts a shorthand letter that can be used after a single dash.
+func StringToIntVarP(p *map[string]int, name, shorthand string, value map[string]int, usage string) {
+	CommandLine.VarP(newStringToIntValue(value, p), name, shorthand, usage)
+}
+
+// StringToInt defines a string flag with specified name, default value, and usage string.
+// The return value is the address of a map[string]int variable that stores the value of the flag.
+// The value of each argument will not try to be separated by comma
+func (f *FlagSet) StringToInt(name string, value map[string]int, usage string) *map[string]int {
+	p := map[string]int{}
+	f.StringToIntVarP(&p, name, "", value, usage)
+	return &p
+}
+
+// StringToIntP is like StringToInt, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) StringToIntP(name, shorthand string, value map[string]int, usage string) *map[string]int {
+	p := map[string]int{}
+	f.StringToIntVarP(&p, name, shorthand, value, usage)
+	return &p
+}
+
+// StringToInt defines a string flag with specified name, default value, and usage string.
+// The return value is the address of a map[string]int variable that stores the value of the flag.
+// The value of each argument will not try to be separated by comma
+func StringToInt(name string, value map[string]int, usage string) *map[string]int {
+	return CommandLine.StringToIntP(name, "", value, usage)
+}
+
+// StringToIntP is like StringToInt, but accepts a shorthand letter that can be used after a single dash.
+func StringToIntP(name, shorthand string, value map[string]int, usage string) *map[string]int {
+	return CommandLine.StringToIntP(name, shorthand, value, usage)
+}
diff --git a/vendor/github.com/spf13/pflag/string_to_string.go b/vendor/github.com/spf13/pflag/string_to_string.go
new file mode 100644
index 0000000..890a01a
--- /dev/null
+++ b/vendor/github.com/spf13/pflag/string_to_string.go
@@ -0,0 +1,160 @@
+package pflag
+
+import (
+	"bytes"
+	"encoding/csv"
+	"fmt"
+	"strings"
+)
+
+// -- stringToString Value
+type stringToStringValue struct {
+	value   *map[string]string
+	changed bool
+}
+
+func newStringToStringValue(val map[string]string, p *map[string]string) *stringToStringValue {
+	ssv := new(stringToStringValue)
+	ssv.value = p
+	*ssv.value = val
+	return ssv
+}
+
+// Format: a=1,b=2
+func (s *stringToStringValue) Set(val string) error {
+	var ss []string
+	n := strings.Count(val, "=")
+	switch n {
+	case 0:
+		return fmt.Errorf("%s must be formatted as key=value", val)
+	case 1:
+		ss = append(ss, strings.Trim(val, `"`))
+	default:
+		r := csv.NewReader(strings.NewReader(val))
+		var err error
+		ss, err = r.Read()
+		if err != nil {
+			return err
+		}
+	}
+
+	out := make(map[string]string, len(ss))
+	for _, pair := range ss {
+		kv := strings.SplitN(pair, "=", 2)
+		if len(kv) != 2 {
+			return fmt.Errorf("%s must be formatted as key=value", pair)
+		}
+		out[kv[0]] = kv[1]
+	}
+	if !s.changed {
+		*s.value = out
+	} else {
+		for k, v := range out {
+			(*s.value)[k] = v
+		}
+	}
+	s.changed = true
+	return nil
+}
+
+func (s *stringToStringValue) Type() string {
+	return "stringToString"
+}
+
+func (s *stringToStringValue) String() string {
+	records := make([]string, 0, len(*s.value)>>1)
+	for k, v := range *s.value {
+		records = append(records, k+"="+v)
+	}
+
+	var buf bytes.Buffer
+	w := csv.NewWriter(&buf)
+	if err := w.Write(records); err != nil {
+		panic(err)
+	}
+	w.Flush()
+	return "[" + strings.TrimSpace(buf.String()) + "]"
+}
+
+func stringToStringConv(val string) (interface{}, error) {
+	val = strings.Trim(val, "[]")
+	// An empty string would cause an empty map
+	if len(val) == 0 {
+		return map[string]string{}, nil
+	}
+	r := csv.NewReader(strings.NewReader(val))
+	ss, err := r.Read()
+	if err != nil {
+		return nil, err
+	}
+	out := make(map[string]string, len(ss))
+	for _, pair := range ss {
+		kv := strings.SplitN(pair, "=", 2)
+		if len(kv) != 2 {
+			return nil, fmt.Errorf("%s must be formatted as key=value", pair)
+		}
+		out[kv[0]] = kv[1]
+	}
+	return out, nil
+}
+
+// GetStringToString return the map[string]string value of a flag with the given name
+func (f *FlagSet) GetStringToString(name string) (map[string]string, error) {
+	val, err := f.getFlagType(name, "stringToString", stringToStringConv)
+	if err != nil {
+		return map[string]string{}, err
+	}
+	return val.(map[string]string), nil
+}
+
+// StringToStringVar defines a string flag with specified name, default value, and usage string.
+// The argument p points to a map[string]string variable in which to store the values of the multiple flags.
+// The value of each argument will not try to be separated by comma
+func (f *FlagSet) StringToStringVar(p *map[string]string, name string, value map[string]string, usage string) {
+	f.VarP(newStringToStringValue(value, p), name, "", usage)
+}
+
+// StringToStringVarP is like StringToStringVar, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) StringToStringVarP(p *map[string]string, name, shorthand string, value map[string]string, usage string) {
+	f.VarP(newStringToStringValue(value, p), name, shorthand, usage)
+}
+
+// StringToStringVar defines a string flag with specified name, default value, and usage string.
+// The argument p points to a map[string]string variable in which to store the value of the flag.
+// The value of each argument will not try to be separated by comma
+func StringToStringVar(p *map[string]string, name string, value map[string]string, usage string) {
+	CommandLine.VarP(newStringToStringValue(value, p), name, "", usage)
+}
+
+// StringToStringVarP is like StringToStringVar, but accepts a shorthand letter that can be used after a single dash.
+func StringToStringVarP(p *map[string]string, name, shorthand string, value map[string]string, usage string) {
+	CommandLine.VarP(newStringToStringValue(value, p), name, shorthand, usage)
+}
+
+// StringToString defines a string flag with specified name, default value, and usage string.
+// The return value is the address of a map[string]string variable that stores the value of the flag.
+// The value of each argument will not try to be separated by comma
+func (f *FlagSet) StringToString(name string, value map[string]string, usage string) *map[string]string {
+	p := map[string]string{}
+	f.StringToStringVarP(&p, name, "", value, usage)
+	return &p
+}
+
+// StringToStringP is like StringToString, but accepts a shorthand letter that can be used after a single dash.
+func (f *FlagSet) StringToStringP(name, shorthand string, value map[string]string, usage string) *map[string]string {
+	p := map[string]string{}
+	f.StringToStringVarP(&p, name, shorthand, value, usage)
+	return &p
+}
+
+// StringToString defines a string flag with specified name, default value, and usage string.
+// The return value is the address of a map[string]string variable that stores the value of the flag.
+// The value of each argument will not try to be separated by comma
+func StringToString(name string, value map[string]string, usage string) *map[string]string {
+	return CommandLine.StringToStringP(name, "", value, usage)
+}
+
+// StringToStringP is like StringToString, but accepts a shorthand letter that can be used after a single dash.
+func StringToStringP(name, shorthand string, value map[string]string, usage string) *map[string]string {
+	return CommandLine.StringToStringP(name, shorthand, value, usage)
+}