diff --git a/iwm_browser/main.py b/iwm_browser/main.py
index f3b45f1..40659f9 100644
--- a/iwm_browser/main.py
+++ b/iwm_browser/main.py
@@ -40,7 +40,7 @@ template_env.globals["__version__"] = __version__
 BASE_URL = utils.config_value("IWM_SERVER", "http://make.fangam.es")
 THUMB_URL = utils.config_value("IWM_THUMBNAILS", "https://images.make.fangam.es")
 utils.global_imgproxy_url = utils.config_value("IMGPROXY_URL", None)
-utils.global_imgproxy_params = utils.config_value("IMGPROXY_PARAMS", '{"extension": "webp", "advanced": ["q:50"]}')  # Set it to None to disable the proxy params
+utils.global_imgproxy_params = utils.config_value("IMGPROXY_PARAMS", {"extension": "webp", "advanced": ["q:50"]})  # Set it to None to disable the proxy params
 
 PROXIES = utils.config_value("HTTP_PROXIES", '{}')