diff --git a/modules/api/api.py b/modules/api/api.py
index 8fcd068d0..d0f488ca1 100644
--- a/modules/api/api.py
+++ b/modules/api/api.py
@@ -126,7 +126,7 @@ class Api:
 
         return ExtrasBatchImagesResponse(images=list(map(encode_pil_to_base64, result[0])), html_info=result[1])
     
-    def pnginfoapi(self, req:PNGInfoRequest):
+    def pnginfoapi(self, req: PNGInfoRequest):
         if(not req.image.strip()):
             return PNGInfoResponse(info="")