diff --git a/src/main/java/org/codelibs/fess/app/web/base/login/FessLoginAssist.java b/src/main/java/org/codelibs/fess/app/web/base/login/FessLoginAssist.java
index 0f225304b..7119649f6 100644
--- a/src/main/java/org/codelibs/fess/app/web/base/login/FessLoginAssist.java
+++ b/src/main/java/org/codelibs/fess/app/web/base/login/FessLoginAssist.java
@@ -37,6 +37,7 @@ import org.lastaflute.web.login.credential.LoginCredential;
 import org.lastaflute.web.login.credential.UserPasswordCredential;
 import org.lastaflute.web.login.exception.LoginRequiredException;
 import org.lastaflute.web.login.option.LoginSpecifiedOption;
+import org.lastaflute.web.servlet.session.SessionManager;
 
 /**
  * @author jflute
@@ -53,6 +54,8 @@ public class FessLoginAssist extends TypicalLoginAssist<String, FessUserBean, Fe
     @Resource
     private AsyncManager asyncManager;
     @Resource
+    private SessionManager sessionManager;
+    @Resource
     private FessConfig fessConfig;
     @Resource
     private UserBhv userBhv;
@@ -167,4 +170,12 @@ public class FessLoginAssist extends TypicalLoginAssist<String, FessUserBean, Fe
             cb.query().setPassword_Equal(cipheredPassword);
         }).map(user -> (FessUser) user);
     }
+
+    // ===================================================================================
+    //                                                                              Logout
+    //                                                                              ======
+    @Override
+    public void logout() {
+        sessionManager.invalidate();
+    }
 }