diff --git a/tg/config.py b/tg/config.py
index c9ed8c9..aa9a794 100644
--- a/tg/config.py
+++ b/tg/config.py
@@ -5,7 +5,7 @@ overwritten by external config file
 import os
 import platform
 import runpy
-from typing import Dict
+from typing import Dict, Optional
 
 _os_name = platform.system()
 _darwin = "Darwin"
@@ -15,7 +15,7 @@ _linux = "Linux"
 CONFIG_DIR = os.path.expanduser("~/.config/tg/")
 CONFIG_FILE = os.path.join(CONFIG_DIR, "conf.py")
 FILES_DIR = os.path.expanduser("~/.cache/tg/")
-MAILCAP_FILE = None
+MAILCAP_FILE: Optional[str] = None
 
 LOG_LEVEL = "INFO"
 LOG_PATH = os.path.expanduser("~/.local/share/tg/")
diff --git a/tg/utils.py b/tg/utils.py
index e8df9f2..3efd6bc 100644
--- a/tg/utils.py
+++ b/tg/utils.py
@@ -17,7 +17,7 @@ from functools import lru_cache
 from logging.handlers import RotatingFileHandler
 from subprocess import CompletedProcess
 from types import TracebackType
-from typing import Any, Optional, Tuple, Type
+from typing import Any, Dict, Optional, Tuple, Type
 
 from tg import config
 
@@ -72,10 +72,10 @@ def get_mime(file_path: str) -> str:
     return mtype.split("/")[0]
 
 
-def get_mailcap():
+def get_mailcap() -> Dict:
     if config.MAILCAP_FILE:
         with open(config.MAILCAP_FILE) as f:
-            return mailcap.readmailcapfile(f)
+            return mailcap.readmailcapfile(f)  # type: ignore
     return mailcap.getcaps()