diff --git a/examples/yesod-subsite/src/Subsite.hs b/examples/yesod-subsite/src/Subsite.hs
index 62c6ba6f..92e49dff 100644
--- a/examples/yesod-subsite/src/Subsite.hs
+++ b/examples/yesod-subsite/src/Subsite.hs
@@ -2,7 +2,6 @@
 {-# LANGUAGE MultiParamTypeClasses #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE TemplateHaskell #-}
-
 -- an option for Template Haskell stage restriction
 {-# OPTIONS_GHC -Wno-orphans #-}
 
@@ -11,15 +10,18 @@ module Subsite (
 ) where
 
 import Subsite.Data (
-  Subsite(Subsite),
-  getSubHomeR,
+  Route (FooR, SubHomeR),
+  Subsite (Subsite),
   getFooR,
+  getSubHomeR,
+  resourcesSubsite,
   routeToPattern,
   routeToRenderer,
-  resourcesSubsite,
-  Route(FooR,SubHomeR))
-import Yesod.Core
-    ( mkYesodSubDispatch, YesodSubDispatch(yesodSubDispatch   ),  )
+ )
+import Yesod.Core (
+  YesodSubDispatch (yesodSubDispatch),
+  mkYesodSubDispatch,
+ )
 
 
 instance YesodSubDispatch Subsite master where
diff --git a/examples/yesod-subsite/src/Subsite/Data.hs b/examples/yesod-subsite/src/Subsite/Data.hs
index 4bb71f62..c76af2d5 100644
--- a/examples/yesod-subsite/src/Subsite/Data.hs
+++ b/examples/yesod-subsite/src/Subsite/Data.hs
@@ -4,22 +4,26 @@
 {-# LANGUAGE TypeFamilies #-}
 
 module Subsite.Data (
-  Subsite(Subsite),
+  Subsite (Subsite),
   getSubHomeR,
   getFooR,
   routeToPattern,
   routeToRenderer,
   resourcesSubsite,
-  Route(FooR,SubHomeR))where
+  Route (FooR, SubHomeR),
+) where
 
 import Data.Text (Text)
-import OpenTelemetry.Instrumentation.Yesod
-    ( mkRouteToPattern, mkRouteToRenderer )
-import Yesod.Core
-    ( mkYesodSubData,
-      parseRoutes,
-      SubHandlerFor,
-      RenderRoute(renderRoute) )
+import OpenTelemetry.Instrumentation.Yesod (
+  mkRouteToPattern,
+  mkRouteToRenderer,
+ )
+import Yesod.Core (
+  RenderRoute (renderRoute),
+  SubHandlerFor,
+  mkYesodSubData,
+  parseRoutes,
+ )
 import Yesod.Core.Types (Route)
 
 
diff --git a/examples/yesod-subsite/src/main.hs b/examples/yesod-subsite/src/main.hs
index 194a5e11..5acee306 100644
--- a/examples/yesod-subsite/src/main.hs
+++ b/examples/yesod-subsite/src/main.hs
@@ -1,43 +1,45 @@
 {-# LANGUAGE DataKinds #-}
+{-# LANGUAGE InstanceSigs #-}
 {-# LANGUAGE MultiParamTypeClasses #-}
 {-# LANGUAGE OverloadedStrings #-}
 {-# LANGUAGE QuasiQuotes #-}
 {-# LANGUAGE ScopedTypeVariables #-}
 {-# LANGUAGE TemplateHaskell #-}
 {-# LANGUAGE TypeFamilies #-}
-{-# LANGUAGE InstanceSigs #-}
-
 -- an option for Template Haskell
 {-# OPTIONS_GHC -Wno-unused-top-binds #-}
 
 import qualified Data.Map as M
 import Data.Text (Text, pack)
 import Network.Wai.Handler.Warp (run)
-import OpenTelemetry.Instrumentation.Wai    ( newOpenTelemetryWaiMiddleware' )
-import OpenTelemetry.Instrumentation.Yesod
-    ( mkRouteToPattern,
-      mkRouteToRenderer,
-      openTelemetryYesodMiddleware,
-      RouteRenderer(RouteRenderer),
-      YesodOpenTelemetryTrace(getTracerProvider) )
-import OpenTelemetry.Trace
-    ( TracerProvider,
-      shutdownTracerProvider,
-      initializeTracerProvider )
+import OpenTelemetry.Instrumentation.Wai (newOpenTelemetryWaiMiddleware')
+import OpenTelemetry.Instrumentation.Yesod (
+  RouteRenderer (RouteRenderer),
+  YesodOpenTelemetryTrace (getTracerProvider),
+  mkRouteToPattern,
+  mkRouteToRenderer,
+  openTelemetryYesodMiddleware,
+ )
+import OpenTelemetry.Trace (
+  TracerProvider,
+  initializeTracerProvider,
+  shutdownTracerProvider,
+ )
 import Subsite (Subsite (Subsite))
 import qualified Subsite
-import UnliftIO ( bracket )
+import UnliftIO (bracket)
 import Yesod.Core (
   RenderRoute (renderRoute),
-  Yesod (yesodMiddleware,errorHandler),
+  Yesod (errorHandler, yesodMiddleware),
   defaultYesodMiddleware,
   mkYesod,
   parseRoutes,
   toWaiApp,
  )
-import Yesod.Core.Handler ( provideRep, selectRep )
+import Yesod.Core.Handler (provideRep, selectRep)
 import Yesod.Routes.TH.Types (ResourceTree)
 
+
 -- | This is my data type. There are many like it, but this one is mine.
 data Site = Site
   { tracerProvider :: TracerProvider
@@ -66,7 +68,6 @@ instance Yesod Site where
   errorHandler err = selectRep $ provideRep $ pure $ pack $ show err
 
 
-
 instance YesodOpenTelemetryTrace Site where
   getTracerProvider = tracerProvider
 
@@ -75,7 +76,6 @@ getRootR :: Handler Text
 getRootR = pure "GET /"
 
 
-
 main :: IO ()
 main = do
   bracket
diff --git a/instrumentation/yesod/src/OpenTelemetry/Instrumentation/Yesod.hs b/instrumentation/yesod/src/OpenTelemetry/Instrumentation/Yesod.hs
index d777945d..a2f74d71 100644
--- a/instrumentation/yesod/src/OpenTelemetry/Instrumentation/Yesod.hs
+++ b/instrumentation/yesod/src/OpenTelemetry/Instrumentation/Yesod.hs
@@ -7,15 +7,15 @@
 {-# LANGUAGE TemplateHaskell #-}
 {-# OPTIONS_GHC -fno-warn-orphans #-}
 
--- | This module makes it easier to use hs-opentelemetry-sdk with yesod.
-module OpenTelemetry.Instrumentation.Yesod (
-{-
+{- | This module makes it easier to use hs-opentelemetry-sdk with yesod.
+
 Let @Site@ be following to use in examples:
 
 @
 newtype Site = Site { siteTracerProvider :: TracerProvider }
 @
 -}
+module OpenTelemetry.Instrumentation.Yesod (
   openTelemetryYesodMiddleware,
   RouteRenderer (..),
   mkRouteToRenderer,
@@ -58,12 +58,14 @@ import Language.Haskell.TH (
   varE,
   varP,
   wildP,
+ )
+
+
 #if MIN_VERSION_template_haskell(2, 17, 0)
-  Quote (newName),
+import Language.Haskell.TH (Quote (newName))
 #else
-  newName,
+import Language.Haskell.TH (newName)
 #endif
- )
 import Lens.Micro (Lens', lens)
 import Network.Wai (Request (vault), requestHeaders)
 import qualified OpenTelemetry.Context as Context
@@ -117,8 +119,6 @@ import Yesod.Routes.TH.Types (
  )
 
 
-
-
 handlerEnvL :: Lens' (HandlerData child site) (RunHandlerEnv child site)
 handlerEnvL = lens handlerEnv (\h e -> h {handlerEnv = e})
 {-# INLINE handlerEnvL #-}