diff --git a/src/main/java/org/ntlab/acanthus_server/models/Accounts.java b/src/main/java/org/ntlab/acanthus_server/models/Accounts.java
index 3aceea6..2c58c6a 100644
--- a/src/main/java/org/ntlab/acanthus_server/models/Accounts.java
+++ b/src/main/java/org/ntlab/acanthus_server/models/Accounts.java
@@ -6,6 +6,7 @@
 import java.util.Collection;
 import java.util.HashMap;
 import java.util.Random;
+import java.util.regex.Pattern;
 
 /*
  * アカウント管理シングルトン