diff --git a/ansi.go b/ansi.go
index 4c41dbd..1b7d2e3 100644
--- a/ansi.go
+++ b/ansi.go
@@ -93,7 +93,7 @@ func (a *ansi) Write(text []byte) (int, error) {
 					var background, foreground string
 					params := a.csiParameter.String()
 					fields := strings.Split(params, ";")
-					if len(params) == 0 || len(fields) == 1 && fields[0] == "0" {
+					if len(params) == 0 || fields[0] == "" || fields[0] == "0" {
 						// Reset.
 						a.attributes = ""
 						if _, err := a.buffer.WriteString("[-:-:-]"); err != nil {
@@ -135,6 +135,10 @@ func (a *ansi) Write(text []byte) (int, error) {
 							if !strings.ContainsRune(a.attributes, 'd') {
 								a.attributes += "d"
 							}
+						case "3", "03":
+							if !strings.ContainsRune(a.attributes, 'i') {
+								a.attributes += "i"
+							}
 						case "4", "04":
 							if !strings.ContainsRune(a.attributes, 'u') {
 								a.attributes += "u"
@@ -143,6 +147,14 @@ func (a *ansi) Write(text []byte) (int, error) {
 							if !strings.ContainsRune(a.attributes, 'l') {
 								a.attributes += "l"
 							}
+						case "7", "07":
+							if !strings.ContainsRune(a.attributes, 'r') {
+								a.attributes += "r"
+							}
+						case "9", "09":
+							if !strings.ContainsRune(a.attributes, 's') {
+								a.attributes += "s"
+							}
 						case "22":
 							if i := strings.IndexRune(a.attributes, 'b'); i >= 0 {
 								a.attributes = a.attributes[:i] + a.attributes[i+1:]
@@ -150,6 +162,10 @@ func (a *ansi) Write(text []byte) (int, error) {
 							if i := strings.IndexRune(a.attributes, 'd'); i >= 0 {
 								a.attributes = a.attributes[:i] + a.attributes[i+1:]
 							}
+						case "23":
+							if i := strings.IndexRune(a.attributes, 'i'); i >= 0 {
+								a.attributes = a.attributes[:i] + a.attributes[i+1:]
+							}
 						case "24":
 							if i := strings.IndexRune(a.attributes, 'u'); i >= 0 {
 								a.attributes = a.attributes[:i] + a.attributes[i+1:]
@@ -158,6 +174,14 @@ func (a *ansi) Write(text []byte) (int, error) {
 							if i := strings.IndexRune(a.attributes, 'l'); i >= 0 {
 								a.attributes = a.attributes[:i] + a.attributes[i+1:]
 							}
+						case "27":
+							if i := strings.IndexRune(a.attributes, 'r'); i >= 0 {
+								a.attributes = a.attributes[:i] + a.attributes[i+1:]
+							}
+						case "29":
+							if i := strings.IndexRune(a.attributes, 's'); i >= 0 {
+								a.attributes = a.attributes[:i] + a.attributes[i+1:]
+							}
 						case "30", "31", "32", "33", "34", "35", "36", "37":
 							colorNumber, _ := strconv.Atoi(field)
 							foreground = lookupColor(colorNumber - 30)