diff --git a/docs/open-api.yaml b/docs/open-api.yaml
index 0de08d43..031d75f9 100644
--- a/docs/open-api.yaml
+++ b/docs/open-api.yaml
@@ -333,6 +333,8 @@ components:
       type: object
       properties:
         title:
+          maxLength: 255
+          minLength: 1
           type: string
         date:
           type: string
diff --git a/src/integrationTest/kotlin/com/group4/ticketingservice/TimeE2ETest.kt b/src/integrationTest/kotlin/com/group4/ticketingservice/TimeE2ETest.kt
index 2e206367..c85d2b02 100644
--- a/src/integrationTest/kotlin/com/group4/ticketingservice/TimeE2ETest.kt
+++ b/src/integrationTest/kotlin/com/group4/ticketingservice/TimeE2ETest.kt
@@ -59,9 +59,9 @@ class TimeE2ETest @Autowired constructor(
     @Test
     fun `All API only returns OffsetDateTime in UTC without any offset info`() {
         val eventCreateRequest = "{\"title\":\"test title\"," +
-            "\"date\":\"2022-09-01T21:00:00.001+09:00\"," +
-            "\"reservationStartTime\":\"2022-09-01T22:00:00.001+09:00\"," +
-            "\"reservationEndTime\":\"2022-09-01T23:00:00.001+09:00\"," +
+            "\"date\":\"2044-02-04T21:00:00.001+09:00\"," +
+            "\"reservationStartTime\":\"2044-01-01T22:00:00.001+09:00\"," +
+            "\"reservationEndTime\":\"2044-01-01T23:00:00.001+09:00\"," +
             "\"maxAttendees\":10}"
 
         mockMvc.perform(
@@ -71,8 +71,8 @@ class TimeE2ETest @Autowired constructor(
         )
             .andExpect(status().isOk)
             .andExpect(content().contentType(MediaType.APPLICATION_JSON))
-            .andExpect(jsonPath("$.date").value("2022-09-01T12:00:00.001Z"))
-            .andExpect(jsonPath("$.reservationStartTime").value("2022-09-01T13:00:00.001Z"))
-            .andExpect(jsonPath("$.reservationEndTime").value("2022-09-01T14:00:00.001Z"))
+            .andExpect(jsonPath("$.date").value("2044-02-04T12:00:00.001Z"))
+            .andExpect(jsonPath("$.reservationStartTime").value("2044-01-01T13:00:00.001Z"))
+            .andExpect(jsonPath("$.reservationEndTime").value("2044-01-01T14:00:00.001Z"))
     }
 }
diff --git a/src/main/kotlin/com/group4/ticketingservice/controller/BookmarkController.kt b/src/main/kotlin/com/group4/ticketingservice/controller/BookmarkController.kt
index 1bf6d9c1..bd66af72 100644
--- a/src/main/kotlin/com/group4/ticketingservice/controller/BookmarkController.kt
+++ b/src/main/kotlin/com/group4/ticketingservice/controller/BookmarkController.kt
@@ -2,6 +2,7 @@ package com.group4.ticketingservice.controller
 
 import com.group4.ticketingservice.dto.BookmarkFromdto
 import com.group4.ticketingservice.service.BookmarkService
+import jakarta.validation.Valid
 import org.springframework.beans.factory.annotation.Autowired
 import org.springframework.http.HttpHeaders
 import org.springframework.http.HttpStatus
@@ -22,7 +23,11 @@ class BookmarkController @Autowired constructor(val bookmarkService: BookmarkSer
 
     // 북마크 등록
     @PostMapping
-    fun addBookmark(@AuthenticationPrincipal userId: Int, @RequestBody boardFormDto: BookmarkFromdto): ResponseEntity<Any> {
+    fun addBookmark(
+        @AuthenticationPrincipal userId: Int,
+        @RequestBody @Valid
+        boardFormDto: BookmarkFromdto
+    ): ResponseEntity<Any> {
         val savedBookmarkId = bookmarkService.create(userId, boardFormDto)
         val headers = HttpHeaders()
         headers.set("Content-Location", "/bookmark/%d".format(savedBookmarkId))
diff --git a/src/main/kotlin/com/group4/ticketingservice/controller/EventController.kt b/src/main/kotlin/com/group4/ticketingservice/controller/EventController.kt
index 7a4c2d4d..dd2fd765 100644
--- a/src/main/kotlin/com/group4/ticketingservice/controller/EventController.kt
+++ b/src/main/kotlin/com/group4/ticketingservice/controller/EventController.kt
@@ -3,6 +3,7 @@ package com.group4.ticketingservice.controller
 import com.group4.ticketingservice.dto.EventCreateRequest
 import com.group4.ticketingservice.dto.EventResponse
 import com.group4.ticketingservice.service.EventService
+import jakarta.validation.Valid
 import org.springframework.beans.factory.annotation.Autowired
 import org.springframework.http.HttpStatus
 import org.springframework.http.ResponseEntity
@@ -21,13 +22,16 @@ class EventController @Autowired constructor(
 
     // TimeE2ETest를 위한 임시 EndPoint입니다.
     @PostMapping
-    fun createEvent(@RequestBody request: EventCreateRequest): ResponseEntity<EventResponse> {
+    fun createEvent(
+        @RequestBody @Valid
+        request: EventCreateRequest
+    ): ResponseEntity<EventResponse> {
         val event = eventService.createEvent(
-            request.title,
-            request.date,
-            request.reservationStartTime,
-            request.reservationEndTime,
-            request.maxAttendees
+            request.title!!,
+            request.date!!,
+            request.reservationStartTime!!,
+            request.reservationEndTime!!,
+            request.maxAttendees!!
         )
         val response = EventResponse(
             id = event.id!!,
diff --git a/src/main/kotlin/com/group4/ticketingservice/controller/ReservationController.kt b/src/main/kotlin/com/group4/ticketingservice/controller/ReservationController.kt
index 87fc8fde..c9982adb 100644
--- a/src/main/kotlin/com/group4/ticketingservice/controller/ReservationController.kt
+++ b/src/main/kotlin/com/group4/ticketingservice/controller/ReservationController.kt
@@ -5,6 +5,7 @@ import com.group4.ticketingservice.dto.ReservationResponse
 import com.group4.ticketingservice.dto.ReservationUpdateRequest
 import com.group4.ticketingservice.entity.Reservation
 import com.group4.ticketingservice.service.ReservationService
+import jakarta.validation.Valid
 import org.springframework.http.ResponseEntity
 import org.springframework.security.core.annotation.AuthenticationPrincipal
 import org.springframework.web.bind.annotation.DeleteMapping
@@ -20,9 +21,13 @@ import org.springframework.web.bind.annotation.RestController
 @RequestMapping("/reservations")
 class ReservationController(val reservationService: ReservationService) {
     @PostMapping
-    fun createReservation(@AuthenticationPrincipal userId: Int, @RequestBody request: ReservationCreateRequest): ResponseEntity<ReservationResponse> {
+    fun createReservation(
+        @AuthenticationPrincipal userId: Int,
+        @RequestBody @Valid
+        request: ReservationCreateRequest
+    ): ResponseEntity<ReservationResponse> {
         val reservation: Reservation = reservationService.createReservation(
-            request.eventId,
+            request.eventId!!,
             userId
         )
         val response = ReservationResponse(
@@ -49,9 +54,10 @@ class ReservationController(val reservationService: ReservationService) {
     @PutMapping("/{id}")
     fun updateReservation(
         @PathVariable id: Int,
-        @RequestBody request: ReservationUpdateRequest
+        @RequestBody @Valid
+        request: ReservationUpdateRequest
     ): ResponseEntity<ReservationResponse> {
-        val reservation = reservationService.updateReservation(id, request.eventId)
+        val reservation = reservationService.updateReservation(id, request.eventId!!)
         val response = ReservationResponse(
             id = reservation.id!!,
             eventId = reservation.event.id!!,
diff --git a/src/main/kotlin/com/group4/ticketingservice/dto/BookmarkFromdto.kt b/src/main/kotlin/com/group4/ticketingservice/dto/BookmarkFromdto.kt
index 87f24297..72dd3ca9 100644
--- a/src/main/kotlin/com/group4/ticketingservice/dto/BookmarkFromdto.kt
+++ b/src/main/kotlin/com/group4/ticketingservice/dto/BookmarkFromdto.kt
@@ -1,5 +1,10 @@
 package com.group4.ticketingservice.dto
 
+import jakarta.validation.constraints.NotNull
+import jakarta.validation.constraints.Positive
+
 data class BookmarkFromdto(
-    var event_id: Int
+    @field:NotNull
+    @field:Positive
+    var event_id: Int?
 )
diff --git a/src/main/kotlin/com/group4/ticketingservice/dto/EventDto.kt b/src/main/kotlin/com/group4/ticketingservice/dto/EventDto.kt
index 258f3ace..98fbf429 100644
--- a/src/main/kotlin/com/group4/ticketingservice/dto/EventDto.kt
+++ b/src/main/kotlin/com/group4/ticketingservice/dto/EventDto.kt
@@ -1,17 +1,35 @@
 package com.group4.ticketingservice.dto
 
+import jakarta.validation.constraints.Future
+import jakarta.validation.constraints.FutureOrPresent
+import jakarta.validation.constraints.NotNull
+import jakarta.validation.constraints.Positive
+import jakarta.validation.constraints.PositiveOrZero
+import jakarta.validation.constraints.Size
 import java.time.OffsetDateTime
 
 data class EventCreateRequest(
-    val title: String,
-    val date: OffsetDateTime,
-    val reservationStartTime: OffsetDateTime,
-    val reservationEndTime: OffsetDateTime,
-    val maxAttendees: Int
+    @field:NotNull
+    @field:Size(min = 1, max = 255)
+    val title: String?,
+    @field:NotNull
+    @field:Future
+    val date: OffsetDateTime?,
+    @field:NotNull
+    @field:FutureOrPresent
+    val reservationStartTime: OffsetDateTime?,
+    @field:NotNull
+    @field:Future
+    val reservationEndTime: OffsetDateTime?,
+    @field:NotNull
+    @field:PositiveOrZero
+    val maxAttendees: Int?
 )
 
 data class EventDeleteRequest(
-    val id: Int
+    @field:NotNull
+    @field:Positive
+    val id: Int?
 )
 
 data class EventResponse(
diff --git a/src/main/kotlin/com/group4/ticketingservice/dto/ReservationDto.kt b/src/main/kotlin/com/group4/ticketingservice/dto/ReservationDto.kt
index 38d10d46..5a251b94 100644
--- a/src/main/kotlin/com/group4/ticketingservice/dto/ReservationDto.kt
+++ b/src/main/kotlin/com/group4/ticketingservice/dto/ReservationDto.kt
@@ -1,17 +1,25 @@
 package com.group4.ticketingservice.dto
 
+import jakarta.validation.constraints.NotNull
+import jakarta.validation.constraints.Positive
 import java.time.OffsetDateTime
 
 data class ReservationCreateRequest(
-    val eventId: Int
+    @field:NotNull
+    @field:Positive
+    val eventId: Int?
 )
 
 data class ReservationUpdateRequest(
-    val eventId: Int
+    @field:NotNull
+    @field:Positive
+    val eventId: Int?
 )
 
 data class ReservationDeleteRequest(
-    val id: Int
+    @field:NotNull
+    @field:Positive
+    val id: Int?
 )
 
 data class ReservationResponse(
diff --git a/src/main/kotlin/com/group4/ticketingservice/service/BookmarkService.kt b/src/main/kotlin/com/group4/ticketingservice/service/BookmarkService.kt
index 514b5902..003908f1 100644
--- a/src/main/kotlin/com/group4/ticketingservice/service/BookmarkService.kt
+++ b/src/main/kotlin/com/group4/ticketingservice/service/BookmarkService.kt
@@ -20,7 +20,7 @@ class BookmarkService @Autowired constructor(
     fun create(userId: Int, bookmarkFormDto: BookmarkFromdto): Int? {
         val user: User = userRepository.getReferenceById(userId)
 
-        val event: Event = eventRepository.getReferenceById(bookmarkFormDto.event_id)
+        val event: Event = eventRepository.getReferenceById(bookmarkFormDto.event_id!!)
 
         val bookmark = Bookmark(user = user, event = event)
 
diff --git a/src/test/kotlin/com/group4/ticketingservice/event/EventControllerTest.kt b/src/test/kotlin/com/group4/ticketingservice/event/EventControllerTest.kt
index 13cd2964..854c09fd 100644
--- a/src/test/kotlin/com/group4/ticketingservice/event/EventControllerTest.kt
+++ b/src/test/kotlin/com/group4/ticketingservice/event/EventControllerTest.kt
@@ -68,9 +68,9 @@ class EventControllerTest(
         every { eventService.createEvent(any(), any(), any(), any(), any()) } returns sampleEvent
 
         val eventCreateRequest = "{\"title\":\"test title\"," +
-            "\"date\":\"2022-09-01T21:00:00.001+09:00\"," +
-            "\"reservationStartTime\":\"2022-09-01T22:00:00.001+09:00\"," +
-            "\"reservationEndTime\":\"2022-09-01T23:00:00.001+09:00\"," +
+            "\"date\":\"2044-02-04T21:00:00.001+09:00\"," +
+            "\"reservationStartTime\":\"2044-01-01T22:00:00.001+09:00\"," +
+            "\"reservationEndTime\":\"2044-01-01T23:00:00.001+09:00\"," +
             "\"maxAttendees\":10}"
 
         mockMvc.perform(