diff --git a/src/PaymentServer/Server.hs b/src/PaymentServer/Server.hs
index e811f2c09ca23129af1ce085d0ba2a82ca7545e5..2df1d1087e0c84bda60ddf9cf751abe0d603cf8c 100644
--- a/src/PaymentServer/Server.hs
+++ b/src/PaymentServer/Server.hs
@@ -23,7 +23,9 @@ import Servant
   , (:>)
   , (:<|>)((:<|>))
   )
-import Prometheus (register)
+import Prometheus
+  ( register
+  )
 import Servant.Prometheus
   ( monitorServant
   , meters