diff --git a/api/utils/web_utils.py b/api/utils/web_utils.py
index 11e8428b7..c13889be2 100644
--- a/api/utils/web_utils.py
+++ b/api/utils/web_utils.py
@@ -86,6 +86,9 @@ CONTENT_TYPE_MAP = {
     "ico": "image/x-icon",
     "avif": "image/avif",
     "heic": "image/heic",
+    # PPTX
+    "ppt": "application/vnd.ms-powerpoint",
+    "pptx": "application/vnd.openxmLformats-officedocument.presentationml.presentation",
 }
 
 
@@ -239,4 +242,4 @@ def hash_code(code: str, salt: bytes) -> str:
 
 def captcha_key(email: str) -> str:
     return f"captcha:{email}"
-    
\ No newline at end of file
+