diff --git a/IHP/AuthSupport/Authorization.hs b/IHP/AuthSupport/Authorization.hs
index 8d9a8eedf..c3798d6eb 100644
--- a/IHP/AuthSupport/Authorization.hs
+++ b/IHP/AuthSupport/Authorization.hs
@@ -6,7 +6,6 @@ Copyright: (c) digitally induced GmbH, 2020
 module IHP.AuthSupport.Authorization where
 
 import IHP.Prelude
-import Control.Monad.Fail (fail)
 
 class CanView user model where
     canView :: (?modelContext :: ModelContext) => model -> user -> IO Bool
diff --git a/IHP/IDE/CodeGen/ControllerGenerator.hs b/IHP/IDE/CodeGen/ControllerGenerator.hs
index f724826c7..cb1f1b477 100644
--- a/IHP/IDE/CodeGen/ControllerGenerator.hs
+++ b/IHP/IDE/CodeGen/ControllerGenerator.hs
@@ -11,7 +11,6 @@ import qualified Data.Char as Char
 import qualified IHP.IDE.SchemaDesigner.Parser as SchemaDesigner
 import IHP.IDE.SchemaDesigner.Types
 import qualified System.Posix.Env.ByteString as Posix
-import Control.Monad.Fail
 import IHP.IDE.CodeGen.Types
 import qualified IHP.IDE.CodeGen.ViewGenerator as ViewGenerator
 
diff --git a/IHP/LoginSupport/Helper/Controller.hs b/IHP/LoginSupport/Helper/Controller.hs
index e9d9d0f2e..ba22ed28f 100644
--- a/IHP/LoginSupport/Helper/Controller.hs
+++ b/IHP/LoginSupport/Helper/Controller.hs
@@ -31,7 +31,6 @@ import qualified IHP.ModelSupport as ModelSupport
 import IHP.ControllerSupport
 import IHP.FrameworkConfig
 import System.IO.Unsafe (unsafePerformIO)
-import Control.Monad.Fail
 import IHP.AuthSupport.Authorization
 import IHP.AuthSupport.Authentication
 import IHP.Controller.Context
diff --git a/IHP/Prelude.hs b/IHP/Prelude.hs
index db3b20d88..e5edae4d9 100644
--- a/IHP/Prelude.hs
+++ b/IHP/Prelude.hs
@@ -37,6 +37,7 @@ module IHP.Prelude
 , module Data.Time.Format
 , null
 , module Control.Exception
+, module Control.Monad.Fail
 )
 where
 
@@ -69,6 +70,7 @@ import Database.PostgreSQL.Simple (FromRow)
 import Data.IORef
 import Data.Time.Format
 import Control.Exception (throw, throwIO, catch)
+import Control.Monad.Fail (fail)
 
 -- Alias for haskell newcomers :)
 a ++ b = a <> b
diff --git a/exe/IHP/CLI/DeleteController.hs b/exe/IHP/CLI/DeleteController.hs
index f10eecbf8..7ccf376d7 100644
--- a/exe/IHP/CLI/DeleteController.hs
+++ b/exe/IHP/CLI/DeleteController.hs
@@ -1,10 +1,8 @@
 module Main where
 
-import ClassyPrelude
-import Data.String.Conversions (cs)
+import IHP.Prelude
 import qualified System.Directory as Directory
 import qualified System.Posix.Env.ByteString as Posix
-import Control.Monad.Fail
 import IHP.IDE.CodeGen.ControllerGenerator
 import IHP.IDE.CodeGen.Controller (undoPlan)
 import qualified Data.Text as Text
diff --git a/exe/IHP/CLI/NewApplication.hs b/exe/IHP/CLI/NewApplication.hs
index e91c3bc2b..e473c8d81 100644
--- a/exe/IHP/CLI/NewApplication.hs
+++ b/exe/IHP/CLI/NewApplication.hs
@@ -1,10 +1,8 @@
 module Main where
 
-import ClassyPrelude
-import Data.String.Conversions (cs)
+import IHP.Prelude
 import qualified System.Directory as Directory
 import qualified System.Posix.Env.ByteString as Posix
-import Control.Monad.Fail
 import IHP.IDE.CodeGen.ApplicationGenerator
 import IHP.IDE.CodeGen.Controller (executePlan)
 
diff --git a/exe/IHP/CLI/NewController.hs b/exe/IHP/CLI/NewController.hs
index 5d341ad88..7a1bc25e2 100644
--- a/exe/IHP/CLI/NewController.hs
+++ b/exe/IHP/CLI/NewController.hs
@@ -1,10 +1,8 @@
 module Main where
 
-import ClassyPrelude
-import Data.String.Conversions (cs)
+import IHP.Prelude
 import qualified System.Directory as Directory
 import qualified System.Posix.Env.ByteString as Posix
-import Control.Monad.Fail
 import IHP.IDE.CodeGen.ControllerGenerator
 import IHP.IDE.CodeGen.Controller (executePlan)
 import qualified Data.Text as Text
diff --git a/exe/IHP/CLI/NewMigration.hs b/exe/IHP/CLI/NewMigration.hs
index fe1879696..5d7896e5e 100644
--- a/exe/IHP/CLI/NewMigration.hs
+++ b/exe/IHP/CLI/NewMigration.hs
@@ -4,7 +4,6 @@ import IHP.Prelude
 import IHP.SchemaMigration
 import qualified System.Posix.Env.ByteString as Posix
 import qualified System.Directory as Directory
-import Control.Monad.Fail
 import IHP.IDE.ToolServer.Helper.Controller (openEditor)
 
 main :: IO ()
diff --git a/exe/IHP/CLI/NewScript.hs b/exe/IHP/CLI/NewScript.hs
index e903c3795..0c15689b9 100644
--- a/exe/IHP/CLI/NewScript.hs
+++ b/exe/IHP/CLI/NewScript.hs
@@ -1,7 +1,6 @@
 module Main where
 
 import IHP.Prelude
-import IHP.HaskellSupport
 import qualified Data.Text as Text
 import qualified Data.Text.IO as Text
 import IHP.ViewSupport