diff --git a/helper-dependencies/pom.xml b/helper-dependencies/pom.xml
index 5eaf522..bec6ba5 100644
--- a/helper-dependencies/pom.xml
+++ b/helper-dependencies/pom.xml
@@ -17,7 +17,6 @@
     <properties>
         <!-- Dependencies versions -->
         <cassandra-driver.version>3.6.0</cassandra-driver.version>
-        <!-- todo cv into helper -->
         <commons-lang3.version>3.9</commons-lang3.version>
         <config.version>1.3.3</config.version>
         <ebean.version>11.22.9</ebean.version>
diff --git a/helper-javafx/src/main/java/com/github/mrzhqiang/helper/javafx/ui/Dialogs.java b/helper-javafx/src/main/java/com/github/mrzhqiang/helper/javafx/ui/Dialogs.java
index 3c282ba..82c33f9 100644
--- a/helper-javafx/src/main/java/com/github/mrzhqiang/helper/javafx/ui/Dialogs.java
+++ b/helper-javafx/src/main/java/com/github/mrzhqiang/helper/javafx/ui/Dialogs.java
@@ -1,6 +1,6 @@
 package com.github.mrzhqiang.helper.javafx.ui;
 
-import com.github.mrzhqiang.helper.StackTraces;
+import com.github.mrzhqiang.helper.Exceptions;
 import com.google.common.base.Preconditions;
 import com.google.common.base.Strings;
 import javafx.scene.control.Alert;
@@ -62,11 +62,11 @@ public static Alert warn(String message, @Nullable String content) {
         return alert;
     }
 
-    public static Alert error(Throwable error) {
+    public static Alert error(Exception error) {
         return error(error.toString(), error);
     }
 
-    public static Alert error(@Nullable String message, Throwable cause) {
+    public static Alert error(@Nullable String message, Exception cause) {
         Preconditions.checkNotNull(cause, "cause == null");
 
         String errorMsg = Strings.isNullOrEmpty(message) ? DEFAULT_ERROR_MESSAGE : message;
@@ -75,7 +75,7 @@ public static Alert error(@Nullable String message, Throwable cause) {
         Alert alert = new Alert(Alert.AlertType.ERROR);
         alert.setTitle("错误");
         alert.setHeaderText(errorMsg);
-        alert.setContentText(StackTraces.of(cause));
+        alert.setContentText(Exceptions.ofTrace(cause));
 
         return alert;
     }
diff --git a/helper-third/pom.xml b/helper-third/pom.xml
index c4a86d4..6006157 100644
--- a/helper-third/pom.xml
+++ b/helper-third/pom.xml
@@ -19,7 +19,6 @@
     <modules>
         <module>helper-third-api</module>
         <module>helper-third-core</module>
-        <module>helper-third-core</module>
     </modules>
 
     <build>
diff --git a/helper/src/test/java/com/github/mrzhqiang/helper/ExceptionsTest.java b/helper/src/test/java/com/github/mrzhqiang/helper/ExceptionsTest.java
new file mode 100644
index 0000000..d3083b6
--- /dev/null
+++ b/helper/src/test/java/com/github/mrzhqiang/helper/ExceptionsTest.java
@@ -0,0 +1,14 @@
+package com.github.mrzhqiang.helper;
+
+import static org.junit.Assert.assertNotEquals;
+import org.junit.Test;
+
+public class ExceptionsTest {
+
+    @Test
+    public void of() {
+        String runtime = Exceptions.ofTrace(new RuntimeException("runtime"));
+        String nullPointer = Exceptions.ofTrace(new NullPointerException("null"));
+        assertNotEquals(runtime, nullPointer);
+    }
+}
diff --git a/helper/src/test/java/com/github/mrzhqiang/helper/StackTracesTest.java b/helper/src/test/java/com/github/mrzhqiang/helper/StackTracesTest.java
index edc5d3b..2fc236f 100644
--- a/helper/src/test/java/com/github/mrzhqiang/helper/StackTracesTest.java
+++ b/helper/src/test/java/com/github/mrzhqiang/helper/StackTracesTest.java
@@ -1,8 +1,7 @@
 package com.github.mrzhqiang.helper;
 
-import org.junit.Test;
-
 import static org.junit.Assert.assertNotEquals;
+import org.junit.Test;
 
 public class StackTracesTest {
 
@@ -12,11 +11,4 @@ public void ofCurrent() {
         String secondTrace = StackTraces.ofCurrent();
         assertNotEquals(firstTrace, secondTrace);
     }
-
-    @Test
-    public void of() {
-        String runtime = StackTraces.of(new RuntimeException("runtime"));
-        String nullPointer = StackTraces.of(new NullPointerException("null"));
-        assertNotEquals(runtime, nullPointer);
-    }
-}
\ No newline at end of file
+}