diff --git a/backend/migrations/20250505012740_v0.1.1.sql b/backend/migrations/20250505012740_v0.1.1.sql
index 1f74985..ffc5dda 100644
--- a/backend/migrations/20250505012740_v0.1.1.sql
+++ b/backend/migrations/20250505012740_v0.1.1.sql
@@ -8,8 +8,8 @@ CREATE TABLE "post" (
     "content" TEXT NOT NULL,
     "published_time" TIMESTAMP,
     "deleted_time" TIMESTAMP,
-    "created_time" TIMESTAMP NOT NULL,
-    "updated_time" TIMESTAMP NOT NULL
+    "created_time" TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updated_time" TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
 );
 
 CREATE TABLE "label" (
@@ -17,8 +17,8 @@ CREATE TABLE "label" (
     "name" TEXT NOT NULL,
     "color" BIGINT NOT NULL CHECK ("color" >= 0 AND "color" <= 4294967295),
     "deleted_time" TIMESTAMP,
-    "created_time" TIMESTAMP NOT NULL,
-    "updated_time" TIMESTAMP NOT NULL
+    "created_time" TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "updated_time" TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP
 );
 
 CREATE TABLE "post_label" (
@@ -28,3 +28,24 @@ CREATE TABLE "post_label" (
     FOREIGN KEY ("post_id") REFERENCES "post" ("id") ON DELETE CASCADE,
     FOREIGN KEY ("label_id") REFERENCES "label" ("id") ON DELETE CASCADE
 );
+
+
+-- Auto update `updated_time` trigger
+
+CREATE FUNCTION update_updated_time_column() RETURNS TRIGGER AS $$
+BEGIN
+    NEW.updated_time = CURRENT_TIMESTAMP;
+    return NEW;
+END;
+$$ LANGUAGE 'plpgsql';
+
+CREATE TRIGGER "update_post_updated_time"
+BEFORE UPDATE ON "post"
+FOR EACH ROW
+EXECUTE FUNCTION update_updated_time_column();
+
+CREATE TRIGGER "update_label_updated_time"
+BEFORE UPDATE ON "label"
+FOR EACH ROW
+EXECUTE FUNCTION update_updated_time_column();
+