diff --git a/IHP/ApplicationContext.hs b/IHP/ApplicationContext.hs
index f596e4768..bb0d66236 100644
--- a/IHP/ApplicationContext.hs
+++ b/IHP/ApplicationContext.hs
@@ -8,7 +8,7 @@ import IHP.FrameworkConfig (FrameworkConfig)
 
 data ApplicationContext = ApplicationContext
     { modelContext :: !ModelContext
-    , session :: Vault.Key (Session IO String String)
-    , autoRefreshServer :: IORef AutoRefreshServer
-    , frameworkConfig :: FrameworkConfig
+    , session :: !(Vault.Key (Session IO String String))
+    , autoRefreshServer :: !(IORef AutoRefreshServer)
+    , frameworkConfig :: !FrameworkConfig
     }
diff --git a/IHP/AutoRefresh/Types.hs b/IHP/AutoRefresh/Types.hs
index 7578b7c02..3a4588b08 100644
--- a/IHP/AutoRefresh/Types.hs
+++ b/IHP/AutoRefresh/Types.hs
@@ -10,22 +10,22 @@ import IHP.Controller.RequestContext
 import Control.Concurrent.MVar (MVar)
 import Data.Set (Set)
 
-data AutoRefreshState = AutoRefreshDisabled | AutoRefreshEnabled { sessionId :: UUID }
+data AutoRefreshState = AutoRefreshDisabled | AutoRefreshEnabled { sessionId :: !UUID }
 data AutoRefreshSession = AutoRefreshSession
-        { id :: UUID
+        { id :: !UUID
         -- | A callback to rerun an action within a given request context
-        , renderView :: RequestContext -> IO ()
+        , renderView :: !(RequestContext -> IO ())
         -- | MVar that is filled whenever some table changed
-        , event :: MVar ()
+        , event :: !(MVar ())
         -- | All tables this auto refresh session watches
-        , tables :: Set ByteString
+        , tables :: !(Set ByteString)
         -- | The last rendered html of this action. Initially this is the result of the initial page rendering
-        , lastResponse :: LByteString
+        , lastResponse :: !LByteString
         -- | Keep track of the last ping to this session to close it after too much time has passed without anything happening
-        , lastPing :: UTCTime
+        , lastPing :: !UTCTime
         }
 
-data AutoRefreshServer = AutoRefreshServer { sessions :: [AutoRefreshSession], subscribedTables :: Set ByteString }
+data AutoRefreshServer = AutoRefreshServer { sessions :: ![AutoRefreshSession], subscribedTables :: !(Set ByteString) }
 
 newAutoRefreshServer :: AutoRefreshServer
 newAutoRefreshServer = AutoRefreshServer { sessions = [], subscribedTables = mempty }
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diff --git a/IHP/FlashMessages/Types.hs b/IHP/FlashMessages/Types.hs
index 7ced67b92..cd8be0291 100644
--- a/IHP/FlashMessages/Types.hs
+++ b/IHP/FlashMessages/Types.hs
@@ -9,5 +9,5 @@ module IHP.FlashMessages.Types
 import IHP.Prelude
 
 data FlashMessage
-    = SuccessFlashMessage Text
-    | ErrorFlashMessage Text
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+    = SuccessFlashMessage !Text
+    | ErrorFlashMessage !Text
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diff --git a/IHP/Router/Types.hs b/IHP/Router/Types.hs
index 612dddb9a..3a1c5d91f 100644
--- a/IHP/Router/Types.hs
+++ b/IHP/Router/Types.hs
@@ -13,9 +13,9 @@ import IHP.Prelude
 -- When opening @/ShowProject?projectId=ab55d579-80cd-4608-9a8f-c76dea6c2332@ everything is fine.
 -- But when opening @/ShowProject?projectId=not-an-uuid@ this exception will be thrown.
 data InvalidActionArgumentException = InvalidActionArgumentException
-        { expectedType :: ByteString
-        , value :: ByteString
-        , field :: ByteString
+        { expectedType :: !ByteString
+        , value :: !ByteString
+        , field :: !ByteString
         } deriving (Eq, Show)
 
 instance Exception InvalidActionArgumentException
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