diff --git a/hls-brittany-plugin.cabal b/hls-brittany-plugin.cabal
--- a/hls-brittany-plugin.cabal
+++ b/hls-brittany-plugin.cabal
@@ -1,6 +1,6 @@
 cabal-version:      2.4
 name:               hls-brittany-plugin
-version:            1.0.1.0
+version:            1.0.1.1
 synopsis:           Integration with the Brittany code formatter
 description:
   Please see the README on GitHub at <https://github.com/haskell/haskell-language-server#readme>
@@ -25,7 +25,7 @@
     , filepath
     , ghc
     , ghc-boot-th
-    , ghcide          >=1.2      && <1.5
+    , ghcide          >=1.2      && <1.6
     , hls-plugin-api  >=1.1      && <1.3
     , lens
     , lsp-types
diff --git a/src/Ide/Plugin/Brittany.hs b/src/Ide/Plugin/Brittany.hs
--- a/src/Ide/Plugin/Brittany.hs
+++ b/src/Ide/Plugin/Brittany.hs
@@ -13,7 +13,7 @@
 import           Data.Text                   (Text)
 import qualified Data.Text                   as T
 import           Development.IDE             hiding (pluginHandlers)
-import           Development.IDE.GHC.Compat  (ModSummary (ms_hspp_opts), topDir)
+import qualified Development.IDE.GHC.Compat  as GHC hiding (Cpp)
 import qualified DynFlags                    as D
 import qualified EnumSet                     as S
 import           GHC.LanguageExtensions.Type
@@ -41,7 +41,6 @@
 import qualified Language.Haskell.GHC.ExactPrint as ExactPrint
 import qualified Language.Haskell.GHC.ExactPrint.Types as ExactPrint
 import qualified Data.Text.Lazy as TextL
-import qualified DynFlags as GHC
 import qualified GHC
 import qualified GHC.LanguageExtensions.Type as GHC
 
@@ -61,8 +60,8 @@
           FormatText    -> (fullRange contents, contents)
           FormatRange r -> (normalize r, extractRange r contents)
     modsum <- fmap msrModSummary $ runAction "brittany" ide $ use_ GetModSummaryWithoutTimestamps nfp
-    let dflags = ms_hspp_opts modsum
-    let withRuntimeLibdir = bracket_ (setEnv key $ topDir dflags) (unsetEnv key)
+    let dflags = GHC.ms_hspp_opts modsum
+    let withRuntimeLibdir = bracket_ (setEnv key $ GHC.topDir dflags) (unsetEnv key)
           where key = "GHC_EXACTPRINT_GHC_LIBDIR"
     res <- withRuntimeLibdir $ formatText dflags confFile opts selectedContents
     case res of