diff --git a/src/main/java/com/alzzaipo/common/TsidUtil.java b/src/main/java/com/alzzaipo/common/TsidUtil.java
new file mode 100644
index 00000000..c1971ae9
--- /dev/null
+++ b/src/main/java/com/alzzaipo/common/TsidUtil.java
@@ -0,0 +1,14 @@
+package com.alzzaipo.common;
+
+import com.github.f4b6a3.tsid.Tsid;
+
+public class TsidUtil {
+
+	public static String toString(Long id) {
+		return Tsid.from(id).encode(62);
+	}
+
+	public static Long toLong(String id) {
+		return Tsid.decode(id, 62).toLong();
+	}
+}
diff --git a/src/main/java/com/alzzaipo/notification/adapter/in/web/criterion/NotificationCriterionController.java b/src/main/java/com/alzzaipo/notification/adapter/in/web/criterion/NotificationCriterionController.java
index 6b5f6dff..20306203 100644
--- a/src/main/java/com/alzzaipo/notification/adapter/in/web/criterion/NotificationCriterionController.java
+++ b/src/main/java/com/alzzaipo/notification/adapter/in/web/criterion/NotificationCriterionController.java
@@ -1,6 +1,7 @@
 package com.alzzaipo.notification.adapter.in.web.criterion;
 
 import com.alzzaipo.common.MemberPrincipal;
+import com.alzzaipo.common.TsidUtil;
 import com.alzzaipo.common.Uid;
 import com.alzzaipo.notification.adapter.in.web.criterion.dto.RegisterNotificationCriterionWebRequest;
 import com.alzzaipo.notification.adapter.in.web.criterion.dto.UpdateNotificationCriterionWebRequest;
@@ -57,7 +58,7 @@ public ResponseEntity<String> updateNotificationCriterion(@AuthenticationPrincip
                                                               @RequestBody UpdateNotificationCriterionWebRequest dto) {
         UpdateNotificationCriterionCommand command = new UpdateNotificationCriterionCommand(
                 principal.getMemberUID(),
-                new Uid(dto.getUid()),
+                new Uid(TsidUtil.toLong(dto.getUid())),
                 dto.getCompetitionRate(),
                 dto.getLockupRate());
 
@@ -68,10 +69,10 @@ public ResponseEntity<String> updateNotificationCriterion(@AuthenticationPrincip
 
     @DeleteMapping("/delete")
     public ResponseEntity<String> deleteNotificationCriterion(@AuthenticationPrincipal MemberPrincipal principal,
-                                                              @RequestParam("uid") Long notificationCriterionUID) {
+                                                              @RequestParam("uid") String uid) {
         DeleteNotificationCriterionCommand command = new DeleteNotificationCriterionCommand(
                 principal.getMemberUID(),
-                new Uid(notificationCriterionUID));
+                new Uid(TsidUtil.toLong(uid)));
 
         deleteNotificationCriterionUseCase.deleteNotificationCriterion(command);
 
diff --git a/src/main/java/com/alzzaipo/notification/adapter/in/web/criterion/dto/UpdateNotificationCriterionWebRequest.java b/src/main/java/com/alzzaipo/notification/adapter/in/web/criterion/dto/UpdateNotificationCriterionWebRequest.java
index a9103abf..996e67ad 100644
--- a/src/main/java/com/alzzaipo/notification/adapter/in/web/criterion/dto/UpdateNotificationCriterionWebRequest.java
+++ b/src/main/java/com/alzzaipo/notification/adapter/in/web/criterion/dto/UpdateNotificationCriterionWebRequest.java
@@ -9,7 +9,7 @@
 @NoArgsConstructor
 public class UpdateNotificationCriterionWebRequest {
 
-    private Long uid;
+    private String uid;
     private int competitionRate;
     private int lockupRate;
 }
diff --git a/src/main/java/com/alzzaipo/notification/application/port/dto/NotificationCriterionView.java b/src/main/java/com/alzzaipo/notification/application/port/dto/NotificationCriterionView.java
index 630589d4..fcba2e32 100644
--- a/src/main/java/com/alzzaipo/notification/application/port/dto/NotificationCriterionView.java
+++ b/src/main/java/com/alzzaipo/notification/application/port/dto/NotificationCriterionView.java
@@ -1,16 +1,17 @@
 package com.alzzaipo.notification.application.port.dto;
 
+import com.alzzaipo.common.TsidUtil;
 import lombok.Getter;
 
 @Getter
 public class NotificationCriterionView {
 
-    private Long uid;
-    private int competitionRate;
-    private int lockupRate;
+    private final String uid;
+    private final int competitionRate;
+    private final int lockupRate;
 
     public NotificationCriterionView(Long uid, int competitionRate, int lockupRate) {
-        this.uid = uid;
+        this.uid = TsidUtil.toString(uid);
         this.competitionRate = competitionRate;
         this.lockupRate = lockupRate;
     }
diff --git a/src/main/java/com/alzzaipo/portfolio/adapter/in/web/PortfolioController.java b/src/main/java/com/alzzaipo/portfolio/adapter/in/web/PortfolioController.java
index d56790ce..0c5dfffc 100644
--- a/src/main/java/com/alzzaipo/portfolio/adapter/in/web/PortfolioController.java
+++ b/src/main/java/com/alzzaipo/portfolio/adapter/in/web/PortfolioController.java
@@ -1,6 +1,7 @@
 package com.alzzaipo.portfolio.adapter.in.web;
 
 import com.alzzaipo.common.MemberPrincipal;
+import com.alzzaipo.common.TsidUtil;
 import com.alzzaipo.common.Uid;
 import com.alzzaipo.portfolio.adapter.in.web.dto.RegisterPortfolioWebRequest;
 import com.alzzaipo.portfolio.adapter.in.web.dto.UpdatePortfolioWebRequest;
@@ -64,10 +65,10 @@ public ResponseEntity<String> updateMemberPortfolio(@AuthenticationPrincipal Mem
 
     @DeleteMapping("/delete")
     public ResponseEntity<String> delete(@AuthenticationPrincipal MemberPrincipal principal,
-                                         @RequestParam("uid") Long portfolioUID) {
+                                         @RequestParam("uid") String uid) {
         DeletePortfolioCommand command = new DeletePortfolioCommand(
                 principal.getMemberUID(),
-                new Uid(portfolioUID));
+                new Uid(TsidUtil.toLong(uid)));
 
         deletePortfolioUseCase.deletePortfolio(command);
 
@@ -86,7 +87,7 @@ private RegisterPortfolioCommand toRegisterPortfolioCommand(MemberPrincipal prin
 
     private UpdatePortfolioCommand toUpdateMemberPortfolioCommand(MemberPrincipal principal, UpdatePortfolioWebRequest dto) {
         return new UpdatePortfolioCommand(
-                new Uid(dto.getUid()),
+                new Uid(TsidUtil.toLong(dto.getUid())),
                 principal.getMemberUID(),
                 dto.getStockCode(),
                 dto.getSharesCnt(),
diff --git a/src/main/java/com/alzzaipo/portfolio/adapter/in/web/dto/UpdatePortfolioWebRequest.java b/src/main/java/com/alzzaipo/portfolio/adapter/in/web/dto/UpdatePortfolioWebRequest.java
index 587e05a0..8a52a191 100644
--- a/src/main/java/com/alzzaipo/portfolio/adapter/in/web/dto/UpdatePortfolioWebRequest.java
+++ b/src/main/java/com/alzzaipo/portfolio/adapter/in/web/dto/UpdatePortfolioWebRequest.java
@@ -9,7 +9,7 @@
 @NoArgsConstructor
 public class UpdatePortfolioWebRequest {
 
-    private Long uid;
+    private String uid;
     private int stockCode;
     private int sharesCnt;
     private Long profit;
diff --git a/src/main/java/com/alzzaipo/portfolio/application/dto/PortfolioView.java b/src/main/java/com/alzzaipo/portfolio/application/dto/PortfolioView.java
index f876b4f2..bed456ce 100644
--- a/src/main/java/com/alzzaipo/portfolio/application/dto/PortfolioView.java
+++ b/src/main/java/com/alzzaipo/portfolio/application/dto/PortfolioView.java
@@ -1,11 +1,12 @@
 package com.alzzaipo.portfolio.application.dto;
 
+import com.alzzaipo.common.TsidUtil;
 import lombok.Getter;
 
 @Getter
 public class PortfolioView {
 
-    private final Long uid;
+    private final String uid;
 
     private final String stockName;
 
@@ -22,7 +23,7 @@ public class PortfolioView {
     private final String memo;
 
     public PortfolioView(Long uid, String stockName, int stockCode, int sharesCnt, Long profit, Long profitRate, String agents, String memo) {
-        this.uid = uid;
+        this.uid = TsidUtil.toString(uid);
         this.stockName = stockName;
         this.stockCode = stockCode;
         this.sharesCnt = sharesCnt;