diff --git a/roles/xmonad/files/xmonad_x220.hs b/roles/xmonad/files/xmonad_x220.hs
index a94eb78..c35236d 100644
--- a/roles/xmonad/files/xmonad_x220.hs
+++ b/roles/xmonad/files/xmonad_x220.hs
@@ -35,7 +35,7 @@ import XMonad.Prompt.FuzzyMatch
 import XMonad.Prompt.Shell
 import XMonad.Prompt.Workspace
 import XMonad.Hooks.WorkspaceHistory (workspaceHistoryHook)
-import XMonad.Hooks.DynamicProperty
+import XMonad.Hooks.OnPropertyChange
 import qualified XMonad.StackSet as W
 import qualified Data.Map        as M
 import Text.Regex.Posix
@@ -177,7 +177,7 @@ myAdditionalKeys =
 
     -- open terminal
     , ("M-S-<Return>",              spawnShell)
-    , ("M-b",                       spawn "firefox")
+    , ("M-b",                       spawn "librewolf")
 
     -- layout
     , ("M-t t",                     switchToLayout "Tall")
@@ -250,7 +250,7 @@ myManageHook = composeAll . concat $
 -- return (All True) if the default handler is to be run afterwards. To
 -- combine event hooks use mappend or mconcat from Data.Monoid.
 --
-myEventHook = dynamicPropertyChange "WM_NAME" (title =? "Database.kdbx - KeePassXC" <||> title =? "Database.kdbx [Gesperrt] - KeePassXC" --> floating)
+myEventHook = onXPropertyChange "WM_NAME" (title =? "Database.kdbx - KeePassXC" <||> title =? "Database.kdbx [Gesperrt] - KeePassXC" --> floating)
     where floating = customFloating $ W.RationalRect (1/8) (1/8) (3/4) (3/4)
 
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