diff --git a/gsh_moscow.zmp/params.txt b/gsh_moscow.zmp/params.txt
index 76a7bce30..309faf6f0 100644
--- a/gsh_moscow.zmp/params.txt
+++ b/gsh_moscow.zmp/params.txt
@@ -6,7 +6,7 @@ name=
 name_9=Moscow Genshtab (school2.ru)
 NameInCache=Gsh_moscow
 DefURLBase=http://dw.school2.ru/map/t
-ContentType=image/png
+ContentType=image/png; binary/octet-stream
 ParentSubMenu=Генштаб
 ParentSubMenu_9=Genshtab
 Ext=.png
@@ -21,4 +21,5 @@ Usesave=1
 UseAntiBan=0
 Sleep=0
 DefHotKey=0
-BanIfLen=0
\ No newline at end of file
+BanIfLen=0
+MimeTypeSubst = "binary/octet-stream=image/png"
\ No newline at end of file