diff --git a/.travis.yml b/.travis.yml
index 4da9766..6420d1c 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,8 +1,9 @@
 language: go
+env:
+  -  GO111MODULE=on
 sudo: required
 go:
-  - 1.7.5
-  - 1.8
+  - "1.11.x"
   - tip
 os:
   - linux
diff --git a/cast.go b/cast.go
index 8b8c208..9fba638 100644
--- a/cast.go
+++ b/cast.go
@@ -122,6 +122,18 @@ func ToStringMapBool(i interface{}) map[string]bool {
 	return v
 }
 
+// ToStringMapInt casts an interface to a map[string]int type.
+func ToStringMapInt(i interface{}) map[string]int {
+	v, _ := ToStringMapIntE(i)
+	return v
+}
+
+// ToStringMapInt64 casts an interface to a map[string]int64 type.
+func ToStringMapInt64(i interface{}) map[string]int64 {
+	v, _ := ToStringMapInt64E(i)
+	return v
+}
+
 // ToStringMap casts an interface to a map[string]interface{} type.
 func ToStringMap(i interface{}) map[string]interface{} {
 	v, _ := ToStringMapE(i)
diff --git a/cast_test.go b/cast_test.go
index b5d9f18..f09c5d4 100644
--- a/cast_test.go
+++ b/cast_test.go
@@ -821,6 +821,83 @@ func TestToStringMapBoolE(t *testing.T) {
 	}
 }
 
+func TestToStringMapIntE(t *testing.T) {
+	tests := []struct {
+		input  interface{}
+		expect map[string]int
+		iserr  bool
+	}{
+		{map[interface{}]interface{}{"v1": 1, "v2": 222}, map[string]int{"v1": 1, "v2": 222}, false},
+		{map[string]interface{}{"v1": 342, "v2": 5141}, map[string]int{"v1": 342, "v2": 5141}, false},
+		{map[string]int{"v1": 33, "v2": 88}, map[string]int{"v1": 33, "v2": 88}, false},
+		{map[string]int32{"v1": int32(33), "v2": int32(88)}, map[string]int{"v1": 33, "v2": 88}, false},
+		{map[string]uint16{"v1": uint16(33), "v2": uint16(88)}, map[string]int{"v1": 33, "v2": 88}, false},
+		{map[string]float64{"v1": float64(8.22), "v2": float64(43.32)}, map[string]int{"v1": 8, "v2": 43}, false},
+		{`{"v1": 67, "v2": 56}`, map[string]int{"v1": 67, "v2": 56}, false},
+
+		// errors
+		{nil, nil, true},
+		{testing.T{}, nil, true},
+		{"", nil, true},
+	}
+
+	for i, test := range tests {
+		errmsg := fmt.Sprintf("i = %d", i) // assert helper message
+
+		v, err := ToStringMapIntE(test.input)
+		if test.iserr {
+			assert.Error(t, err, errmsg)
+			continue
+		}
+
+		assert.NoError(t, err, errmsg)
+		assert.Equal(t, test.expect, v, errmsg)
+
+		// Non-E test
+		v = ToStringMapInt(test.input)
+		assert.Equal(t, test.expect, v, errmsg)
+	}
+}
+
+func TestToStringMapInt64E(t *testing.T) {
+	tests := []struct {
+		input  interface{}
+		expect map[string]int64
+		iserr  bool
+	}{
+		{map[interface{}]interface{}{"v1": int32(8), "v2": int32(888)}, map[string]int64{"v1": int64(8), "v2": int64(888)}, false},
+		{map[string]interface{}{"v1": int64(45), "v2": int64(67)}, map[string]int64{"v1": 45, "v2": 67}, false},
+		{map[string]int64{"v1": 33, "v2": 88}, map[string]int64{"v1": 33, "v2": 88}, false},
+		{map[string]int{"v1": 33, "v2": 88}, map[string]int64{"v1": 33, "v2": 88}, false},
+		{map[string]int32{"v1": int32(33), "v2": int32(88)}, map[string]int64{"v1": 33, "v2": 88}, false},
+		{map[string]uint16{"v1": uint16(33), "v2": uint16(88)}, map[string]int64{"v1": 33, "v2": 88}, false},
+		{map[string]float64{"v1": float64(8.22), "v2": float64(43.32)}, map[string]int64{"v1": 8, "v2": 43}, false},
+		{`{"v1": 67, "v2": 56}`, map[string]int64{"v1": 67, "v2": 56}, false},
+
+		// errors
+		{nil, nil, true},
+		{testing.T{}, nil, true},
+		{"", nil, true},
+	}
+
+	for i, test := range tests {
+		errmsg := fmt.Sprintf("i = %d", i) // assert helper message
+
+		v, err := ToStringMapInt64E(test.input)
+		if test.iserr {
+			assert.Error(t, err, errmsg)
+			continue
+		}
+
+		assert.NoError(t, err, errmsg)
+		assert.Equal(t, test.expect, v, errmsg)
+
+		// Non-E test
+		v = ToStringMapInt64(test.input)
+		assert.Equal(t, test.expect, v, errmsg)
+	}
+}
+
 func TestToStringMapStringE(t *testing.T) {
 	var stringMapString = map[string]string{"key 1": "value 1", "key 2": "value 2", "key 3": "value 3"}
 	var stringMapInterface = map[string]interface{}{"key 1": "value 1", "key 2": "value 2", "key 3": "value 3"}
@@ -1112,6 +1189,7 @@ func TestToTimeEE(t *testing.T) {
 		{"Tue, 10 Nov 2009 23:00:00 UTC", time.Date(2009, 11, 10, 23, 0, 0, 0, time.UTC), false},   // RFC1123
 		{"Tue, 10 Nov 2009 23:00:00 +0000", time.Date(2009, 11, 10, 23, 0, 0, 0, time.UTC), false}, // RFC1123Z
 		{"2009-11-10T23:00:00Z", time.Date(2009, 11, 10, 23, 0, 0, 0, time.UTC), false},            // RFC3339
+		{"2018-10-21T23:21:29+0200", time.Date(2018, 10, 21, 21, 21, 29, 0, time.UTC), false},      // RFC3339 without timezone hh:mm colon
 		{"2009-11-10T23:00:00Z", time.Date(2009, 11, 10, 23, 0, 0, 0, time.UTC), false},            // RFC3339Nano
 		{"11:00PM", time.Date(0, 1, 1, 23, 0, 0, 0, time.UTC), false},                              // Kitchen
 		{"Nov 10 23:00:00", time.Date(0, 11, 10, 23, 0, 0, 0, time.UTC), false},                    // Stamp
@@ -1119,6 +1197,7 @@ func TestToTimeEE(t *testing.T) {
 		{"Nov 10 23:00:00.000000", time.Date(0, 11, 10, 23, 0, 0, 0, time.UTC), false},             // StampMicro
 		{"Nov 10 23:00:00.000000000", time.Date(0, 11, 10, 23, 0, 0, 0, time.UTC), false},          // StampNano
 		{"2016-03-06 15:28:01-00:00", time.Date(2016, 3, 6, 15, 28, 1, 0, time.UTC), false},        // RFC3339 without T
+		{"2016-03-06 15:28:01-0000", time.Date(2016, 3, 6, 15, 28, 1, 0, time.UTC), false},         // RFC3339 without T or timezone hh:mm colon
 		{"2016-03-06 15:28:01", time.Date(2016, 3, 6, 15, 28, 1, 0, time.UTC), false},
 		{"2016-03-06 15:28:01 -0000", time.Date(2016, 3, 6, 15, 28, 1, 0, time.UTC), false},
 		{"2016-03-06 15:28:01 -00:00", time.Date(2016, 3, 6, 15, 28, 1, 0, time.UTC), false},
diff --git a/caste.go b/caste.go
index f72a309..58561c4 100644
--- a/caste.go
+++ b/caste.go
@@ -32,9 +32,11 @@ var ParseDateFormats = []string{
 	"2006-01-02 15:04:05.999999999 -0700 MST", // Time.String()
 	"2006-01-02",
 	"02 Jan 2006",
+	"2006-01-02T15:04:05-0700", // RFC3339 without timezone hh:mm colon
 	"2006-01-02 15:04:05 -07:00",
 	"2006-01-02 15:04:05 -0700",
 	"2006-01-02 15:04:05Z07:00", // RFC3339 without T
+	"2006-01-02 15:04:05Z0700",  // RFC3339 without T or timezone hh:mm colon
 	"2006-01-02 15:04:05",
 	time.Kitchen,
 	time.Stamp,
@@ -1019,6 +1021,87 @@ func ToStringMapE(i interface{}) (map[string]interface{}, error) {
 	}
 }
 
+// ToStringMapIntE casts an interface to a map[string]int{} type.
+func ToStringMapIntE(i interface{}) (map[string]int, error) {
+	var m = map[string]int{}
+	if i == nil {
+		return m, fmt.Errorf("unable to cast %#v of type %T to map[string]int", i, i)
+	}
+
+	switch v := i.(type) {
+	case map[interface{}]interface{}:
+		for k, val := range v {
+			m[ToString(k)] = ToInt(val)
+		}
+		return m, nil
+	case map[string]interface{}:
+		for k, val := range v {
+			m[k] = ToInt(val)
+		}
+		return m, nil
+	case map[string]int:
+		return v, nil
+	case string:
+		err := jsonStringToObject(v, &m)
+		return m, err
+	}
+
+	if reflect.TypeOf(i).Kind() != reflect.Map {
+		return m, fmt.Errorf("unable to cast %#v of type %T to map[string]int", i, i)
+	}
+
+	mVal := reflect.ValueOf(m)
+	v := reflect.ValueOf(i)
+	for _, keyVal := range v.MapKeys() {
+		val, err := ToIntE(v.MapIndex(keyVal).Interface())
+		if err != nil {
+			return m, fmt.Errorf("unable to cast %#v of type %T to map[string]int", i, i)
+		}
+		mVal.SetMapIndex(keyVal, reflect.ValueOf(val))
+	}
+	return m, nil
+}
+
+// ToStringMapInt64E casts an interface to a map[string]int64{} type.
+func ToStringMapInt64E(i interface{}) (map[string]int64, error) {
+	var m = map[string]int64{}
+	if i == nil {
+		return m, fmt.Errorf("unable to cast %#v of type %T to map[string]int64", i, i)
+	}
+
+	switch v := i.(type) {
+	case map[interface{}]interface{}:
+		for k, val := range v {
+			m[ToString(k)] = ToInt64(val)
+		}
+		return m, nil
+	case map[string]interface{}:
+		for k, val := range v {
+			m[k] = ToInt64(val)
+		}
+		return m, nil
+	case map[string]int64:
+		return v, nil
+	case string:
+		err := jsonStringToObject(v, &m)
+		return m, err
+	}
+
+	if reflect.TypeOf(i).Kind() != reflect.Map {
+		return m, fmt.Errorf("unable to cast %#v of type %T to map[string]int64", i, i)
+	}
+	mVal := reflect.ValueOf(m)
+	v := reflect.ValueOf(i)
+	for _, keyVal := range v.MapKeys() {
+		val, err := ToInt64E(v.MapIndex(keyVal).Interface())
+		if err != nil {
+			return m, fmt.Errorf("unable to cast %#v of type %T to map[string]int64", i, i)
+		}
+		mVal.SetMapIndex(keyVal, reflect.ValueOf(val))
+	}
+	return m, nil
+}
+
 // ToSliceE casts an interface to a []interface{} type.
 func ToSliceE(i interface{}) ([]interface{}, error) {
 	var s []interface{}
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..c1c0232
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,7 @@
+module github.com/spf13/cast
+
+require (
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/pmezard/go-difflib v1.0.0 // indirect
+	github.com/stretchr/testify v1.2.2
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..e03ee77
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,6 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
+github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=