diff --git a/contrib/api_template.py b/contrib/api_template.py
index dce31ff..ea02391 100644
--- a/contrib/api_template.py
+++ b/contrib/api_template.py
@@ -1,6 +1,6 @@
 from typing import Dict, List, Union
 
-from mangadlp.metadata import ChapterData
+from mangadlp.types import ChapterData,ComicInfo
 
 # api template for manga-dlp
 
@@ -56,7 +56,7 @@ class YourAPI:
             },
         }
         # or with --forcevol
-        self.manga_chapter_data: Dict[str, Dict[str, Union[str, int]]] = {
+        self.manga_chapter_data: Dict[str, ChapterData] = {
             "1:1": {
                 "uuid": "abc",
                 "volume": "1",
@@ -157,7 +157,7 @@ class YourAPI:
 
             # example
             return {
-                "Volume": "abc",
+                "Volume": 1,
                 "LanguageISO": "en",
                 "Title": "test",
             }
diff --git a/mangadlp/api/mangadex.py b/mangadlp/api/mangadex.py
index 0fc2380..1d7b046 100644
--- a/mangadlp/api/mangadex.py
+++ b/mangadlp/api/mangadex.py
@@ -6,7 +6,7 @@ import requests
 from loguru import logger as log
 
 from mangadlp import utils
-from mangadlp.metadata import ChapterData, ComicInfo
+from mangadlp.types import ChapterData, ComicInfo
 
 
 class Mangadex:
diff --git a/mangadlp/app.py b/mangadlp/app.py
index 7aa7fec..6ee44c0 100644
--- a/mangadlp/app.py
+++ b/mangadlp/app.py
@@ -9,7 +9,8 @@ from mangadlp import downloader, utils
 from mangadlp.api.mangadex import Mangadex
 from mangadlp.cache import CacheDB
 from mangadlp.hooks import run_hook
-from mangadlp.metadata import ChapterData, write_metadata
+from mangadlp.metadata import write_metadata
+from mangadlp.types import ChapterData
 from mangadlp.utils import get_file_format
 
 
diff --git a/mangadlp/metadata.py b/mangadlp/metadata.py
index 78eea57..d183147 100644
--- a/mangadlp/metadata.py
+++ b/mangadlp/metadata.py
@@ -1,9 +1,11 @@
 from pathlib import Path
-from typing import Any, Dict, Optional, Tuple, TypedDict, Union
+from typing import Any, Dict, Tuple, Union
 
 import xmltodict
 from loguru import logger as log
 
+from mangadlp.types import ComicInfo
+
 METADATA_FILENAME = "ComicInfo.xml"
 METADATA_TEMPLATE = Path("mangadlp/metadata/ComicInfo_v2.0.xml")
 # define metadata types, defaults and valid values. an empty list means no value check
@@ -59,55 +61,6 @@ METADATA_TYPES: Dict[str, Tuple[type, Any, list[Union[str, int]]]] = {
 }
 
 
-class ComicInfo(TypedDict, total=False):
-    """ComicInfo.xml basic types.
-
-    Validation is done via metadata.validate_metadata()
-    All valid types and values are specified in metadata.METADATA_TYPES
-    """
-
-    Title: Optional[str]
-    Series: Optional[str]
-    Number: Optional[str]
-    Count: Optional[int]
-    Volume: Optional[int]
-    AlternateSeries: Optional[str]
-    AlternateNumber: Optional[str]
-    AlternateCount: Optional[int]
-    Summary: Optional[str]
-    Notes: Optional[str]
-    Year: Optional[int]
-    Month: Optional[int]
-    Day: Optional[int]
-    Writer: Optional[str]
-    Colorist: Optional[str]
-    Publisher: Optional[str]
-    Genre: Optional[str]
-    Web: Optional[str]
-    PageCount: Optional[int]
-    LanguageISO: Optional[str]
-    Format: Optional[str]
-    BlackAndWhite: Optional[str]
-    Manga: Optional[str]
-    ScanInformation: Optional[str]
-    SeriesGroup: Optional[str]
-    AgeRating: Optional[str]
-    CommunityRating: Optional[int]
-
-
-class ChapterData(TypedDict):
-    """Basic chapter-data types.
-
-    All values have to be provided.
-    """
-
-    uuid: str
-    volume: str
-    chapter: str
-    name: str
-    pages: int
-
-
 def validate_metadata(metadata_in: ComicInfo) -> Dict[str, ComicInfo]:
     log.info("Validating metadata")
 
diff --git a/mangadlp/types.py b/mangadlp/types.py
new file mode 100644
index 0000000..b924bf4
--- /dev/null
+++ b/mangadlp/types.py
@@ -0,0 +1,50 @@
+from typing import Optional, TypedDict
+
+
+class ComicInfo(TypedDict, total=False):
+    """ComicInfo.xml basic types.
+
+    Validation is done via metadata.validate_metadata()
+    All valid types and values are specified in metadata.METADATA_TYPES
+    """
+
+    Title: Optional[str]
+    Series: Optional[str]
+    Number: Optional[str]
+    Count: Optional[int]
+    Volume: Optional[int]
+    AlternateSeries: Optional[str]
+    AlternateNumber: Optional[str]
+    AlternateCount: Optional[int]
+    Summary: Optional[str]
+    Notes: Optional[str]
+    Year: Optional[int]
+    Month: Optional[int]
+    Day: Optional[int]
+    Writer: Optional[str]
+    Colorist: Optional[str]
+    Publisher: Optional[str]
+    Genre: Optional[str]
+    Web: Optional[str]
+    PageCount: Optional[int]
+    LanguageISO: Optional[str]
+    Format: Optional[str]
+    BlackAndWhite: Optional[str]
+    Manga: Optional[str]
+    ScanInformation: Optional[str]
+    SeriesGroup: Optional[str]
+    AgeRating: Optional[str]
+    CommunityRating: Optional[int]
+
+
+class ChapterData(TypedDict):
+    """Basic chapter-data types.
+
+    All values have to be provided.
+    """
+
+    uuid: str
+    volume: str
+    chapter: str
+    name: str
+    pages: int