diff --git a/server/szurubooru/func/image_hash.py b/server/szurubooru/func/image_hash.py
index 8d1cd2a6..a445e62d 100644
--- a/server/szurubooru/func/image_hash.py
+++ b/server/szurubooru/func/image_hash.py
@@ -44,7 +44,7 @@ def _preprocess_image(content: bytes) -> NpMatrix:
     try:
         img = Image.open(BytesIO(content))
         return np.asarray(img.convert("L"), dtype=np.uint8)
-    except IOError:
+    except (IOError, ValueError):
         raise errors.ProcessingError(
             "Unable to generate a signature hash " "for this image."
         )