diff --git a/aiogram/filters/command.py b/aiogram/filters/command.py
index b590ba67..f3df8bfc 100644
--- a/aiogram/filters/command.py
+++ b/aiogram/filters/command.py
@@ -164,7 +164,12 @@ class Command(Filter):
                 result = allowed_command.match(command.command)
                 if result:
                     return replace(command, regexp_match=result)
-            elif command.command == allowed_command:  # String
+
+            command_name = command.command
+            if self.ignore_case:
+                command_name, allowed_command = map(str.casefold, (command_name, allowed_command))
+
+            if command_name == allowed_command:  # String
                 return command
         raise CommandException("Command did not match pattern")