diff --git a/src/main/java/com/alibaba/druid/sql/parser/Lexer.java b/src/main/java/com/alibaba/druid/sql/parser/Lexer.java
index cb2273670f..924dd906fd 100644
--- a/src/main/java/com/alibaba/druid/sql/parser/Lexer.java
+++ b/src/main/java/com/alibaba/druid/sql/parser/Lexer.java
@@ -40,7 +40,6 @@ import java.util.Arrays;
 import java.util.List;
 
 import com.alibaba.druid.util.StringUtils;
-import org.apache.commons.lang.math.NumberUtils;
 
 /**
  * @author wenshao [szujobs@hotmail.com]