diff --git a/hls-call-hierarchy-plugin.cabal b/hls-call-hierarchy-plugin.cabal
--- a/hls-call-hierarchy-plugin.cabal
+++ b/hls-call-hierarchy-plugin.cabal
@@ -1,6 +1,6 @@
 cabal-version:      2.4
 name:               hls-call-hierarchy-plugin
-version:            1.2.0.0
+version:            2.0.0.0
 synopsis:           Call hierarchy plugin for Haskell Language Server
 description:
   Please see the README on GitHub at <https://github.com/haskell/haskell-language-server/tree/master/plugins/hls-call-hierarchy-plugin#readme>
@@ -33,9 +33,9 @@
     , base                  >=4.12 && <5
     , containers
     , extra
-    , ghcide                ^>= 1.9
+    , ghcide                == 2.0.0.0
     , hiedb
-    , hls-plugin-api        ^>= 1.6
+    , hls-plugin-api        == 2.0.0.0
     , lens
     , lsp                    >=1.2.0.1
     , sqlite-simple
@@ -59,7 +59,7 @@
     , extra
     , filepath
     , hls-call-hierarchy-plugin
-    , hls-test-utils              ^>=1.5
+    , hls-test-utils              == 2.0.0.0
     , ghcide-test-utils
     , lens
     , lsp
diff --git a/test/Main.hs b/test/Main.hs
--- a/test/Main.hs
+++ b/test/Main.hs
@@ -12,10 +12,10 @@
 import           Data.List                (sort, tails)
 import qualified Data.Map                 as M
 import qualified Data.Text                as T
+import           Development.IDE.Test
 import           Ide.Plugin.CallHierarchy
 import qualified Language.LSP.Test        as Test
 import qualified Language.LSP.Types.Lens  as L
-import Development.IDE.Test
 import           System.Directory.Extra
 import           System.FilePath
 import qualified System.IO.Extra