diff --git a/discord/ext/commands/core.py b/discord/ext/commands/core.py
index 9650bd6f..42ef5ff9 100644
--- a/discord/ext/commands/core.py
+++ b/discord/ext/commands/core.py
@@ -136,6 +136,14 @@ application_option_type_lookup = {
     discord.Role: 8,
     float: 10,
 }
+application_option_channel_types = {
+    discord.VoiceChannel: [2],
+    discord.TextChannel: [0, 5, 6],
+    discord.CategoryChannel: [4],
+    discord.Thread: [10, 11, 12],
+    discord.StageChannel: [13],
+}
+
 
 if TYPE_CHECKING:
     P = ParamSpec("P")
@@ -1265,12 +1273,19 @@ class Command(_BaseCommand, Generic[CogT, P, T]):
             for python_type, discord_type in application_option_type_lookup.items():
                 if issubclass(annotation, python_type):
                     option["type"] = discord_type
+                    # Set channel types
+                    if discord_type == 7:
+                        option["channel_types"] = application_option_channel_types[annotation]
                     break
 
         elif origin is Union:
             if annotation in {Union[discord.Member, discord.Role], Union[MemberConverter, RoleConverter]}:
                 option["type"] = 9
 
+            elif all([arg in application_option_channel_types for arg in annotation.__args__]):
+                option["type"] = 7
+                option["channel_types"] = [discord_value for arg in annotation.__args__ for discord_value in application_option_channel_types[arg]]
+
         elif origin is Literal:
             literal_values = annotation.__args__
             python_type = type(literal_values[0])