diff --git a/play.lua b/play.lua
index f7b75fe..25b378a 100644
--- a/play.lua
+++ b/play.lua
@@ -186,7 +186,8 @@ for startIdx = 1, totalFrames, BATCH_SIZE do
     local resp,err = http.post(
         server_url .. "/api/framepack",
         textutils.serializeJSON({ urls = urls }),
-        { ["Content-Type"] = "application/json" }
+        { ["Content-Type"] = "application/json" },
+        true
     )
 
     
@@ -316,7 +317,8 @@ local function cacheAhead()
                         url = server_url .. "/api/framepack?"..batch.urls[1],
                         headers = { ["Content-Type"] = "application/json" },
                         body = textutils.serializeJSON({ urls = batch.urls } ),
-                        timeout = 3
+                        timeout = 3,
+                        binary = true
                     }
                     )