diff --git a/api/src/main/java/com/javadiscord/jdi/core/api/GuildScheduledEventRequest.java b/api/src/main/java/com/javadiscord/jdi/core/api/GuildScheduledEventRequest.java
index 425f88af..60bfdc3f 100644
--- a/api/src/main/java/com/javadiscord/jdi/core/api/GuildScheduledEventRequest.java
+++ b/api/src/main/java/com/javadiscord/jdi/core/api/GuildScheduledEventRequest.java
@@ -2,10 +2,7 @@
 
 import java.util.List;
 
-import com.javadiscord.jdi.core.api.builders.CreateScheduledEventBuilder;
-import com.javadiscord.jdi.core.api.builders.GetScheduledEventBuilder;
-import com.javadiscord.jdi.core.api.builders.GetScheduledEventUsersBuilder;
-import com.javadiscord.jdi.core.api.builders.ListScheduledEventsBuilder;
+import com.javadiscord.jdi.core.api.builders.*;
 import com.javadiscord.jdi.core.models.scheduled_event.EventUser;
 import com.javadiscord.jdi.core.models.scheduled_event.ScheduledEvent;
 import com.javadiscord.jdi.internal.api.guild_scheduled_event.*;
@@ -23,6 +20,10 @@ public AsyncResponse<ScheduledEvent> createScheduledEvent(CreateScheduledEventBu
         return responseParser.callAndParse(ScheduledEvent.class, builder.guildId(guildId).build());
     }
 
+    public AsyncResponse<ScheduledEvent> modifyScheduledEvent(ModifyScheduledEventBuilder builder) {
+        return responseParser.callAndParse(ScheduledEvent.class, builder.build());
+    }
+
     public AsyncResponse<ScheduledEvent> deleteScheduledEvent(long scheduledEventId) {
         return responseParser.callAndParse(
             ScheduledEvent.class, new DeleteScheduledEventRequest(guildId, scheduledEventId)
diff --git a/api/src/main/java/com/javadiscord/jdi/core/api/builders/ModifyScheduledEventBuilder.java b/api/src/main/java/com/javadiscord/jdi/core/api/builders/ModifyScheduledEventBuilder.java
index f5a0eec6..f0f6a0e2 100644
--- a/api/src/main/java/com/javadiscord/jdi/core/api/builders/ModifyScheduledEventBuilder.java
+++ b/api/src/main/java/com/javadiscord/jdi/core/api/builders/ModifyScheduledEventBuilder.java
@@ -4,6 +4,7 @@
 
 import com.javadiscord.jdi.core.models.guild.EntityMetadata;
 import com.javadiscord.jdi.core.models.guild.PrivacyLevel;
+import com.javadiscord.jdi.core.models.scheduled_event.ScheduledEntityType;
 import com.javadiscord.jdi.internal.api.guild_scheduled_event.ModifyScheduledEventRequest;
 
 public class ModifyScheduledEventBuilder {
@@ -14,9 +15,9 @@ public class ModifyScheduledEventBuilder {
     private Optional<String> name;
     private Optional<Integer> privacyLevel;
     private Optional<Long> scheduledStartTime;
-    private Optional<Long> scheduledEndTim;
+    private Optional<Long> scheduledEndTime;
     private Optional<String> description;
-    private Optional<Integer> entityType;
+    private Optional<ScheduledEntityType> entityType;
     private Optional<Integer> status;
     private Optional<String> image;
 
@@ -28,7 +29,7 @@ public ModifyScheduledEventBuilder(long guildId, long scheduledEventId) {
         this.name = Optional.empty();
         this.privacyLevel = Optional.empty();
         this.scheduledStartTime = Optional.empty();
-        this.scheduledEndTim = Optional.empty();
+        this.scheduledEndTime = Optional.empty();
         this.description = Optional.empty();
         this.entityType = Optional.empty();
         this.status = Optional.empty();
@@ -60,8 +61,8 @@ public ModifyScheduledEventBuilder scheduledStartTime(long scheduledStartTime) {
         return this;
     }
 
-    public ModifyScheduledEventBuilder scheduledEndTim(long scheduledEndTim) {
-        this.scheduledEndTim = Optional.of(scheduledEndTim);
+    public ModifyScheduledEventBuilder scheduledEndTime(long scheduledEndTim) {
+        this.scheduledEndTime = Optional.of(scheduledEndTim);
         return this;
     }
 
@@ -70,12 +71,12 @@ public ModifyScheduledEventBuilder description(String description) {
         return this;
     }
 
-    public ModifyScheduledEventBuilder entityType(Integer entityType) {
+    public ModifyScheduledEventBuilder entityType(ScheduledEntityType entityType) {
         this.entityType = Optional.of(entityType);
         return this;
     }
 
-    public ModifyScheduledEventBuilder status(Integer status) {
+    public ModifyScheduledEventBuilder status(int status) {
         this.status = Optional.of(status);
         return this;
     }
@@ -86,6 +87,20 @@ public ModifyScheduledEventBuilder image(String image) {
     }
 
     public ModifyScheduledEventRequest build() {
+        if (entityType.isPresent() && entityType.get() == ScheduledEntityType.EXTERNAL) {
+            if (entityMetadata.isEmpty() || scheduledEndTime.isEmpty()) {
+                throw new IllegalArgumentException(
+                    "When entityType is EXTERNAL, both entityMetadata and scheduledEndTime must"
+                        + " be provided"
+                );
+            }
+            if (channelId.isPresent()) {
+                throw new IllegalArgumentException(
+                    "When entityType is EXTERNAL, channelId must not be provided"
+                );
+            }
+        }
+
         return new ModifyScheduledEventRequest(
             guildId,
             scheduledEventId,
@@ -94,7 +109,7 @@ public ModifyScheduledEventRequest build() {
             name,
             privacyLevel,
             scheduledStartTime,
-            scheduledEndTim,
+            scheduledEndTime,
             description,
             entityType,
             status,
diff --git a/api/src/main/java/com/javadiscord/jdi/internal/api/guild_scheduled_event/ModifyScheduledEventRequest.java b/api/src/main/java/com/javadiscord/jdi/internal/api/guild_scheduled_event/ModifyScheduledEventRequest.java
index 8e4dd41f..d7ed742e 100644
--- a/api/src/main/java/com/javadiscord/jdi/internal/api/guild_scheduled_event/ModifyScheduledEventRequest.java
+++ b/api/src/main/java/com/javadiscord/jdi/internal/api/guild_scheduled_event/ModifyScheduledEventRequest.java
@@ -5,6 +5,7 @@
 import java.util.Optional;
 
 import com.javadiscord.jdi.core.models.guild.EntityMetadata;
+import com.javadiscord.jdi.core.models.scheduled_event.ScheduledEntityType;
 import com.javadiscord.jdi.internal.api.DiscordRequest;
 import com.javadiscord.jdi.internal.api.DiscordRequestBuilder;
 
@@ -18,30 +19,14 @@ public record ModifyScheduledEventRequest(
     Optional<Long> scheduledStartTime,
     Optional<Long> scheduledEndTime,
     Optional<String> description,
-    Optional<Integer> entityType,
+    Optional<ScheduledEntityType> entityType,
     Optional<Integer> status,
     Optional<String> image
 ) implements DiscordRequest {
     @Override
     public DiscordRequestBuilder create() {
         Map<String, Object> body = new HashMap<>();
-
-        // check if entityType = 3 (EXTERNAL)
-        // channelId must be set to null
-        // entityMetadata (entity_metadata), scheduledEndTime are all required
-        if (entityType.isPresent() && entityType.get() == 3) {
-            if (entityMetadata.isEmpty() || scheduledEndTime.isEmpty()) {
-                throw new IllegalArgumentException(
-                    "When entityType is EXTERNAL, both entityMetadata and scheduledEndTime must"
-                        + " be provided"
-                );
-            }
-
-            body.put("channel_id", null);
-        } else {
-            channelId.ifPresent(val -> body.put("channel_id", val));
-        }
-
+        channelId.ifPresent(val -> body.put("channel_id", val));
         entityMetadata.ifPresent(val -> body.put("entity_metadata", val));
         name.ifPresent(val -> body.put("name", val));
         privacyLevel.ifPresent(val -> body.put("privacy_level", val));
diff --git a/models/src/main/java/com/javadiscord/jdi/core/models/scheduled_event/ScheduledEntityType.java b/models/src/main/java/com/javadiscord/jdi/core/models/scheduled_event/ScheduledEntityType.java
index 62511387..e87b06af 100644
--- a/models/src/main/java/com/javadiscord/jdi/core/models/scheduled_event/ScheduledEntityType.java
+++ b/models/src/main/java/com/javadiscord/jdi/core/models/scheduled_event/ScheduledEntityType.java
@@ -1,7 +1,21 @@
 package com.javadiscord.jdi.core.models.scheduled_event;
 
+import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
+
 public enum ScheduledEntityType {
     STAGE_INSTANCE,
     VOICE,
-    EXTERNAL
+    EXTERNAL;
+
+    @JsonCreator
+    public static ScheduledEntityType fromIndex(int index) {
+        return ScheduledEntityType.values()[index - 1];
+    }
+
+    @JsonValue
+    public int toValue() {
+        return ordinal() + 1;
+    }
+
 }
diff --git a/models/src/main/java/com/javadiscord/jdi/core/models/scheduled_event/ScheduledEvent.java b/models/src/main/java/com/javadiscord/jdi/core/models/scheduled_event/ScheduledEvent.java
index c94e402e..eeef2567 100644
--- a/models/src/main/java/com/javadiscord/jdi/core/models/scheduled_event/ScheduledEvent.java
+++ b/models/src/main/java/com/javadiscord/jdi/core/models/scheduled_event/ScheduledEvent.java
@@ -20,7 +20,7 @@ public record ScheduledEvent(
     @JsonProperty("privacy_level") PrivacyLevel privacyLevel,
     @JsonProperty("status") EventStatus status,
     @JsonProperty("entity_type") ScheduledEntityType entityType,
-    @JsonProperty("entity_id") Long entityId,
+    @JsonProperty("entity_id") long entityId,
     @JsonProperty("entity_metadata") EntityMetadata entityMetadata,
     @JsonProperty("creator") User creator,
     @JsonProperty("user_count") int userCount,