diff --git a/spring-security-kerberos-core/src/main/java/org/springframework/security/kerberos/authentication/JaasSubjectHolder.java b/spring-security-kerberos-core/src/main/java/org/springframework/security/kerberos/authentication/JaasSubjectHolder.java
index 673b4bf..5f4415c 100644
--- a/spring-security-kerberos-core/src/main/java/org/springframework/security/kerberos/authentication/JaasSubjectHolder.java
+++ b/spring-security-kerberos-core/src/main/java/org/springframework/security/kerberos/authentication/JaasSubjectHolder.java
@@ -33,7 +33,7 @@ import org.springframework.security.kerberos.authentication.sun.SunJaasKerberosC
  */
 public class JaasSubjectHolder implements Serializable {
 
-	private static final long serialVersionUID = 8174713761131577405L;
+    private static final long serialVersionUID = 8174713761131577405L;
 
     private Subject jaasSubject;
     private String username;
diff --git a/spring-security-kerberos-core/src/main/java/org/springframework/security/kerberos/authentication/KerberosUsernamePasswordAuthenticationToken.java b/spring-security-kerberos-core/src/main/java/org/springframework/security/kerberos/authentication/KerberosUsernamePasswordAuthenticationToken.java
index 5df078d..7d1920b 100644
--- a/spring-security-kerberos-core/src/main/java/org/springframework/security/kerberos/authentication/KerberosUsernamePasswordAuthenticationToken.java
+++ b/spring-security-kerberos-core/src/main/java/org/springframework/security/kerberos/authentication/KerberosUsernamePasswordAuthenticationToken.java
@@ -38,7 +38,7 @@ public class KerberosUsernamePasswordAuthenticationToken
 
     private static final long serialVersionUID = 6327699460703504153L;
 
-	private final JaasSubjectHolder jaasSubjectHolder;
+    private final JaasSubjectHolder jaasSubjectHolder;
 
     /**
      * <p>Creates an authentication token that holds the username and password, and the Subject