diff --git a/src/PaymentServer/Main.hs b/src/PaymentServer/Main.hs
index adbc78b7754d89481363380c483f17064f42c9fe..7d9ee2a744eb96d4f977e728298e21da1385742a 100644
--- a/src/PaymentServer/Main.hs
+++ b/src/PaymentServer/Main.hs
@@ -10,13 +10,10 @@ import Network.Wai.Handler.Warp
   ( run
   )
 import Network.Wai.Middleware.RequestLogger
-  ( OutputFormat(Detailed, CustomOutputFormatWithDetails)
+  ( OutputFormat(Detailed)
   , outputFormat
   , mkRequestLogger
   )
-import Network.Wai.Middleware.RequestLogger.JSON
-  ( formatAsJSON
-  )
 import PaymentServer.Persistence
   ( memory
   )