diff --git a/README.md b/README.md
index 73a0cf552..972abb999 100644
--- a/README.md
+++ b/README.md
@@ -83,4 +83,5 @@ def setup(bot):
     - [dispike](https://github.com/ms7m/dispike)
     - [discord-interactions-python](https://github.com/discord/discord-interactions-python)
 - Or for other languages:
-    - [discord-api-docs Community Resources: Interactions](https://discord.com/developers/docs/topics/community-resources#interactions)
\ No newline at end of file
+    - [discord-api-docs Community Resources: Interactions](https://discord.com/developers/docs/topics/community-resources#interactions)
+
diff --git a/discord_slash/client.py b/discord_slash/client.py
index 840565647..6493c6b28 100644
--- a/discord_slash/client.py
+++ b/discord_slash/client.py
@@ -69,6 +69,7 @@ def __init__(
             self.logger.warning(
                 "Detected discord.Client! It is highly recommended to use `commands.Bot`. Do not add any `on_socket_response` event."
             )
+
             self._discord.on_socket_response = self.on_socket_response
             self.has_listener = False
         else:
@@ -502,6 +503,10 @@ def add_slash_command(
         name = name or cmd.__name__
         name = name.lower()
         guild_ids = guild_ids if guild_ids else []
+        if not all(isinstance(item, int) for item in guild_ids) and guild_ids is not []:
+            raise error.IncorrectGuildIDType(
+                f"The snowflake IDs {guild_ids} given are not a list of integers. Because of discord.py convention, please use integer IDs instead. Furthermore, the command '{name}' will be deactivated and broken until fixed."
+            )
         if name in self.commands:
             tgt = self.commands[name]
             if not tgt.has_subcommands:
@@ -580,6 +585,10 @@ def add_subcommand(
         name = name.lower()
         description = description or getdoc(cmd)
         guild_ids = guild_ids if guild_ids else []
+        if not all(isinstance(item, int) for item in guild_ids) and guild_ids is not []:
+            raise error.IncorrectGuildIDType(
+                f"The snowflake IDs {guild_ids} given are not a list of integers. Because of discord.py convention, please use integer IDs instead. Furthermore, the command '{name}' will be deactivated and broken until fixed."
+            )
 
         if base in self.commands:
             for x in guild_ids:
@@ -727,6 +736,7 @@ def wrapper(cmd):
                 permissions,
                 connector,
             )
+
             return obj
 
         return wrapper
@@ -825,6 +835,7 @@ def wrapper(cmd):
                 options,
                 connector,
             )
+
             return obj
 
         return wrapper
diff --git a/discord_slash/cog_ext.py b/discord_slash/cog_ext.py
index 54e699f1f..7f3f9c75e 100644
--- a/discord_slash/cog_ext.py
+++ b/discord_slash/cog_ext.py
@@ -1,6 +1,7 @@
 import inspect
 import typing
 
+from .error import IncorrectGuildIDType
 from .model import CogBaseCommandObject, CogSubcommandObject
 from .utils import manage_commands
 
@@ -13,7 +14,7 @@ def cog_slash(
     options: typing.List[dict] = None,
     default_permission: bool = True,
     permissions: typing.Dict[int, list] = None,
-    connector: dict = None
+    connector: dict = None,
 ):
     """
     Decorator for Cog to add slash command.\n
@@ -54,6 +55,12 @@ def wrapper(cmd):
         else:
             opts = options
 
+        if guild_ids is not None:
+            if not all(isinstance(item, int) for item in guild_ids):
+                raise IncorrectGuildIDType(
+                    f"The snowflake IDs {guild_ids} given are not a list of integers. Because of discord.py convention, please use integer IDs instead. Furthermore, the command '{name or cmd.__name__}' will be deactivated and broken until fixed."
+                )
+
         _cmd = {
             "func": cmd,
             "description": desc,
@@ -83,7 +90,7 @@ def cog_subcommand(
     sub_group_desc: str = None,
     guild_ids: typing.List[int] = None,
     options: typing.List[dict] = None,
-    connector: dict = None
+    connector: dict = None,
 ):
     """
     Decorator for Cog to add subcommand.\n
@@ -137,6 +144,12 @@ def wrapper(cmd):
         else:
             opts = options
 
+        if guild_ids is not None:
+            if not all(isinstance(item, int) for item in guild_ids):
+                raise IncorrectGuildIDType(
+                    f"The snowflake IDs {guild_ids} given are not a list of integers. Because of discord.py convention, please use integer IDs instead. Furthermore, the command '{name or cmd.__name__}' will be deactivated and broken until fixed."
+                )
+
         _cmd = {
             "func": None,
             "description": base_description,
diff --git a/discord_slash/error.py b/discord_slash/error.py
index 897576281..30e6041ed 100644
--- a/discord_slash/error.py
+++ b/discord_slash/error.py
@@ -58,6 +58,12 @@ class IncorrectType(SlashCommandError):
     """
 
 
+class IncorrectGuildIDType(SlashCommandError):
+    """
+    Guild ID type passed was incorrect
+    """
+
+
 class IncorrectCommandData(SlashCommandError):
     """
     Incorrect data was passed to a slash command data object