diff --git a/install.lua b/install.lua
index b8af1f5..fc16f03 100644
--- a/install.lua
+++ b/install.lua
@@ -38,7 +38,7 @@ local function main()
 
   log.info("Downloading index file")
   local indexrequest = http.get(URLs.fileIndex)
-  local index = textutils.unserializeJson(indexrequest.readAll())
+  local index = textutils.unserializeJSON(indexrequest.readAll())
   indexrequest.close()
 
   if (index == nil) then