1 files changed, 1 insertions, 1 deletions

diff --git a/src/luarocks/upload/multipart.lua b/src/luarocks/upload/multipart.lua
index 57aad42d..aad2e439 100644
--- a/src/luarocks/upload/multipart.lua
+++ b/src/luarocks/upload/multipart.lua
@@ -26,7 +26,7 @@ function File:mime()
 end
 
 function File:content()
-   local fd = io.open(self.fname)
+   local fd = io.open(self.fname, "rb")
    if not fd then
       return nil, "Failed to open file: "..self.fname
    end