diff --git a/src/invidious/routes/api/v1/authentication.cr b/src/invidious/routes/api/v1/authentication.cr
index c42d9965..e20910f9 100644
--- a/src/invidious/routes/api/v1/authentication.cr
+++ b/src/invidious/routes/api/v1/authentication.cr
@@ -1,7 +1,7 @@
 module Invidious::Routes::API::V1::Authentication
   def self.register(env)
     env.response.content_type = "application/json"
-    body_json : String = env.request.body
+    body_json : String = env.request.body.gets_to_end
     if CONFIG.registration_enabled
       creds = nil
       begin