diff --git a/CHANGELOG-V3.md b/CHANGELOG-V3.md
index eb94407d2e..b7cb4ce04a 100644
--- a/CHANGELOG-V3.md
+++ b/CHANGELOG-V3.md
@@ -5,6 +5,10 @@ release.
 
 ### Added
 
+- `StickerFormatType.file_extension` will be `None` instead of `"png"` when an unknown
+  sticker format is encountered.
+  [#58](https://github.com/Pycord-Development/pycord-next/pull/58)
+
 ### Fixed
 
 ### Changed
diff --git a/discord/enums.py b/discord/enums.py
index 4de87b9ff3..780621d9f2 100644
--- a/discord/enums.py
+++ b/discord/enums.py
@@ -636,15 +636,14 @@ class StickerFormatType(Enum):
     gif = 4
 
     @property
-    def file_extension(self) -> str:
+    def file_extension(self) -> str | None:
         lookup: dict[StickerFormatType, str] = {
             StickerFormatType.png: "png",
             StickerFormatType.apng: "png",
             StickerFormatType.lottie: "json",
             StickerFormatType.gif: "gif",
         }
-        # TODO: Improve handling of unknown sticker format types if possible
-        return lookup.get(self, "png")
+        return lookup.get(self)
 
 
 class InviteTarget(Enum):