diff --git a/src/ios_webkit_debug_proxy.c b/src/ios_webkit_debug_proxy.c
index 46bb1bba..597693ca 100644
--- a/src/ios_webkit_debug_proxy.c
+++ b/src/ios_webkit_debug_proxy.c
@@ -200,10 +200,10 @@ char *iwdp_ipages_to_text(iwdp_ipage_t *ipages, bool want_json,
 const char *EXT_TO_MIME[][2] = {
   {"css", "text/css"},
   {"gif", "image/gif; charset=binary"},
-  {"html", "text/html; charset=ISO-8859-1"},
+  {"html", "text/html; charset=UTF-8"},
   {"ico", "image/x-icon"},
   {"js", "application/javascript"},
-  {"json", "application/json"},
+  {"json", "application/json; charset=UTF-8"},
   {"png", "image/png; charset=binary"},
   {"txt", "text/plain"},
 };