--- /tmp/utils.py	2026-01-06 19:56:00.680007371 +0100
+++ env/lib/python3.13/site-packages/datasette_media/utils.py	2026-01-06 20:12:07.268007831 +0100
@@ -15,14 +15,20 @@
 
 
 def image_type_for_bytes(b):
-    image_type = imghdr.what(None, b)
-    if image_type is not None:
-        return image_type
-    # Maybe it's an HEIC?
+    # Try to detect the image format using Pillow
+    try:
+        image = Image.open(io.BytesIO(b))
+        return image.format.lower()  # Returns format like 'jpeg', 'png', etc.
+    except Exception as e:
+        # If Pillow can't identify the image, continue to the HEIC check
+        pass
+    
+    # Maybe it's an HEIC? Check the magic bytes for HEIC detection
     if len(b) < 12:
         return None
     if b[4:12] in heic_magics:
         return "heic"
+    
     return None