diff --git a/gradle.properties b/gradle.properties
index b211493..097003d 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -1,6 +1,6 @@
 ## Core
 
-VERSION = 0.7.0.11
+VERSION = 0.7.0.12
 
 # dependencies
 
diff --git a/src/main/java/cc/sukazyo/cono/morny/GradleProjectConfigures.java b/src/main/java/cc/sukazyo/cono/morny/GradleProjectConfigures.java
index b304e90..c9bbcf6 100644
--- a/src/main/java/cc/sukazyo/cono/morny/GradleProjectConfigures.java
+++ b/src/main/java/cc/sukazyo/cono/morny/GradleProjectConfigures.java
@@ -4,6 +4,6 @@ package cc.sukazyo.cono.morny;
  * the final field that will be updated by gradle automatically.
  */
 public class GradleProjectConfigures {
-	public static final String VERSION = "0.7.0.11";
-	public static final long COMPILE_TIMESTAMP = 1653443614307L;
+	public static final String VERSION = "0.7.0.12";
+	public static final long COMPILE_TIMESTAMP = 1653445911339L;
 }
diff --git a/src/main/java/cc/sukazyo/cono/morny/util/TelegramUserInformation.java b/src/main/java/cc/sukazyo/cono/morny/util/TelegramUserInformation.java
index 4d0126d..efa3257 100644
--- a/src/main/java/cc/sukazyo/cono/morny/util/TelegramUserInformation.java
+++ b/src/main/java/cc/sukazyo/cono/morny/util/TelegramUserInformation.java
@@ -60,28 +60,14 @@ public class TelegramUserInformation {
 			if (dataCenter == null) { userInformation.append("\ndatacenter : <u>null</u>"); }
 			else { userInformation.append(String.format("\ndatacenter : <code>%s</code>", escapeHtml(dataCenter))); }
 		}
-		if (user.firstName() == null) {
-			userInformation.append("\nfirstname : <u>null</u>");
-		} else {
-			userInformation.append(String.format(
-					"""
-					
-					firstname :
-					- <code>%s</code>""",
-					escapeHtml(user.firstName())
-			));
-		}
-		if (user.lastName() == null) {
-			userInformation.append("\nlastname : <u>null</u>");
-		} else {
-			userInformation.append(String.format(
-					"""
-					
-					lastname :
-					- <code>%s</code>""",
-					escapeHtml(user.lastName())
-			));
-		}
+		userInformation.append(String.format(
+				"""
+				
+				display name :
+				- <code>%s</code>%s""",
+				escapeHtml(user.firstName()),
+				user.lastName()==null ? "" : String.format("\n- <code>%s</code>", escapeHtml(user.lastName()))
+		));
 		if (user.languageCode() != null) {
 			userInformation.append(String.format(
 					"""