diff --git a/cabal.project b/cabal.project
index b1f8ec131..cbe2086b9 100644
--- a/cabal.project
+++ b/cabal.project
@@ -15,4 +15,4 @@ constraints:
 
 write-ghc-environment-files: never
 
-index-state: 2020-02-02T17:43:42Z
+index-state: 2020-02-05T07:49:28Z
diff --git a/haskell-ide-engine.cabal b/haskell-ide-engine.cabal
index ce3b2b967..b801f7c2d 100644
--- a/haskell-ide-engine.cabal
+++ b/haskell-ide-engine.cabal
@@ -73,8 +73,8 @@ library
                      , gitrev >= 1.1
                      , haddock-api
                      , haddock-library
-                     , haskell-lsp == 0.19.*
-                     , haskell-lsp-types == 0.19.*
+                     , haskell-lsp == 0.20.*
+                     , haskell-lsp-types == 0.20.*
                      , haskell-src-exts
                      , hie-plugin-api >= 1.1
                      , hoogle >= 5.0.13
@@ -219,7 +219,7 @@ test-suite unit-test
                      , free
                      , ghc
                      , haskell-ide-engine
-                     , haskell-lsp-types == 0.19.*
+                     , haskell-lsp-types == 0.20.*
                      , hie-bios
                      , hie-test-utils
                      , hie-plugin-api
@@ -312,8 +312,8 @@ test-suite func-test
                      , filepath
                      , lsp-test >= 0.10.0.0
                      , haskell-ide-engine
-                     , haskell-lsp-types == 0.19.*
-                     , haskell-lsp == 0.19.*
+                     , haskell-lsp-types == 0.20.*
+                     , haskell-lsp == 0.20.*
                      , hie-test-utils
                      , hie-plugin-api
                      , hspec
diff --git a/hie-plugin-api/Haskell/Ide/Engine/Ghc.hs b/hie-plugin-api/Haskell/Ide/Engine/Ghc.hs
index e40514b30..d819b5815 100644
--- a/hie-plugin-api/Haskell/Ide/Engine/Ghc.hs
+++ b/hie-plugin-api/Haskell/Ide/Engine/Ghc.hs
@@ -26,7 +26,6 @@ import qualified Data.Map.Strict                   as Map
 import qualified Data.Set                          as Set
 import qualified Data.Text                         as T
 import qualified Data.Aeson
-import           Data.Coerce
 import           ErrUtils
 
 import           Haskell.Ide.Engine.MonadFunctions
@@ -73,7 +72,8 @@ instance Monoid Diagnostics where
 
 instance Data.Aeson.ToJSON Diagnostics where
   toJSON (Diagnostics d) = Data.Aeson.toJSON
-    (Map.mapKeys coerce d :: Map.Map T.Text (Set.Set Diagnostic))
+    (Map.mapKeys extractUri d :: Map.Map T.Text (Set.Set Diagnostic))
+    where extractUri (NormalizedUri _ t) =  t
 
 type AdditionalErrs = [T.Text]
 
diff --git a/hie-plugin-api/hie-plugin-api.cabal b/hie-plugin-api/hie-plugin-api.cabal
index 2265d7029..691839c44 100644
--- a/hie-plugin-api/hie-plugin-api.cabal
+++ b/hie-plugin-api/hie-plugin-api.cabal
@@ -54,7 +54,7 @@ library
                      , ghc
                      , hie-bios
                      , cabal-helper
-                     , haskell-lsp == 0.19.*
+                     , haskell-lsp == 0.20.*
                      , hslogger
                      , unliftio
                      , monad-control
diff --git a/stack-8.4.2.yaml b/stack-8.4.2.yaml
index 40466aa9f..ecd86545c 100644
--- a/stack-8.4.2.yaml
+++ b/stack-8.4.2.yaml
@@ -27,8 +27,8 @@ extra-deps:
 - ghc-lib-parser-ex-8.8.4.0
 - haddock-api-2.20.0
 - haddock-library-1.6.0
-- haskell-lsp-0.19.0.0
-- haskell-lsp-types-0.19.0.0
+- haskell-lsp-0.20.0.0
+- haskell-lsp-types-0.20.0.0
 - haskell-src-exts-1.21.1
 - haskell-src-exts-util-0.2.5
 - hie-bios-0.4.0
@@ -39,7 +39,7 @@ extra-deps:
 - invariant-0.5.3
 - lens-4.18.1
 - libyaml-0.1.1.0
-- lsp-test-0.10.0.0
+- lsp-test-0.10.1.0
 - microlens-th-0.4.3.2
 - monad-dijkstra-0.1.1.2
 - network-3.1.1.1 # for hslogger
diff --git a/stack-8.4.3.yaml b/stack-8.4.3.yaml
index 8b9a41a0d..ea534dbf4 100644
--- a/stack-8.4.3.yaml
+++ b/stack-8.4.3.yaml
@@ -33,8 +33,8 @@ extra-deps:
 - ghc-lib-parser-ex-8.8.4.0
 - haddock-api-2.20.0
 - haddock-library-1.6.0
-- haskell-lsp-0.19.0.0
-- haskell-lsp-types-0.19.0.0
+- haskell-lsp-0.20.0.0
+- haskell-lsp-types-0.20.0.0
 - haskell-src-exts-1.21.1
 - haskell-src-exts-util-0.2.5
 - hie-bios-0.4.0
@@ -49,7 +49,7 @@ extra-deps:
 - invariant-0.5.3
 - lens-4.18.1
 - libyaml-0.1.1.1
-- lsp-test-0.10.0.0
+- lsp-test-0.10.1.0
 - microlens-th-0.4.3.4
 - monad-dijkstra-0.1.1.2
 - network-3.1.1.1 # for hslogger
diff --git a/stack-8.4.4.yaml b/stack-8.4.4.yaml
index 82de37511..50f15caa4 100644
--- a/stack-8.4.4.yaml
+++ b/stack-8.4.4.yaml
@@ -26,8 +26,8 @@ extra-deps:
 - ghc-lib-parser-ex-8.8.4.0
 - haddock-api-2.20.0
 - haddock-library-1.6.0
-- haskell-lsp-0.19.0.0
-- haskell-lsp-types-0.19.0.0
+- haskell-lsp-0.20.0.0
+- haskell-lsp-types-0.20.0.0
 - haskell-src-exts-1.21.1
 - haskell-src-exts-util-0.2.5
 - hie-bios-0.4.0
@@ -38,7 +38,7 @@ extra-deps:
 - invariant-0.5.3
 - lens-4.18.1
 - libyaml-0.1.1.0
-- lsp-test-0.10.0.0
+- lsp-test-0.10.1.0
 - microlens-th-0.4.3.2
 - monad-dijkstra-0.1.1.2
 - network-3.1.1.1 # for hslogger
diff --git a/stack-8.6.4.yaml b/stack-8.6.4.yaml
index aab19aa5f..2fab67abb 100644
--- a/stack-8.6.4.yaml
+++ b/stack-8.6.4.yaml
@@ -20,14 +20,14 @@ extra-deps:
 - ghc-lib-parser-8.8.2
 - ghc-lib-parser-ex-8.8.4.0
 - haddock-api-2.22.0
-- haskell-lsp-0.19.0.0
-- haskell-lsp-types-0.19.0.0
+- haskell-lsp-0.20.0.0
+- haskell-lsp-types-0.20.0.0
 - haskell-src-exts-1.21.1
 - hie-bios-0.4.0
 - hlint-2.2.10
 - hoogle-5.0.17.11
 - hsimport-0.11.0
-- lsp-test-0.10.0.0
+- lsp-test-0.10.1.0
 - monad-dijkstra-0.1.1.2@rev:1
 - monad-memo-0.4.1
 - multistate-0.8.0.1
diff --git a/stack-8.6.5.yaml b/stack-8.6.5.yaml
index 284298dff..e8a77c1e3 100644
--- a/stack-8.6.5.yaml
+++ b/stack-8.6.5.yaml
@@ -22,14 +22,14 @@ extra-deps:
 - ghc-lib-parser-8.8.2
 - ghc-lib-parser-ex-8.8.4.0
 - haddock-api-2.22.0
-- haskell-lsp-0.19.0.0
-- haskell-lsp-types-0.19.0.0
+- haskell-lsp-0.20.0.0
+- haskell-lsp-types-0.20.0.0
 - hie-bios-0.4.0
 - hlint-2.2.10
 - hoogle-5.0.17.11
 - hsimport-0.11.0
 - indexed-profunctors-0.1
-- lsp-test-0.10.0.0
+- lsp-test-0.10.1.0
 - monad-dijkstra-0.1.1.2
 - optics-core-0.2
 - optparse-applicative-0.15.1.0
@@ -38,6 +38,7 @@ extra-deps:
 - semialign-1.1
 - temporary-1.2.1.1
 - topograph-1
+
 flags:
   haskell-ide-engine:
     pedantic: true
diff --git a/stack-8.8.1.yaml b/stack-8.8.1.yaml
index f7406c436..53441bb5a 100644
--- a/stack-8.8.1.yaml
+++ b/stack-8.8.1.yaml
@@ -17,6 +17,9 @@ extra-deps:
 - ghc-lib-parser-ex-8.8.4.0
 - haddock-api-2.23.0
 - haddock-library-1.8.0
+- haskell-lsp-0.20.0.0
+- haskell-lsp-types-0.20.0.0
+- lsp-test-0.10.1.0
 - haskell-src-exts-1.21.1
 - hie-bios-0.4.0
 - hlint-2.2.10
diff --git a/stack-8.8.2.yaml b/stack-8.8.2.yaml
index 6139467ba..3037a3d81 100644
--- a/stack-8.8.2.yaml
+++ b/stack-8.8.2.yaml
@@ -20,6 +20,9 @@ extra-deps:
     - haddock-api
 # - haddock-api-2.23.0
 - haddock-library-1.8.0
+- haskell-lsp-0.20.0.0
+- haskell-lsp-types-0.20.0.0
+- lsp-test-0.10.1.0
 - haskell-src-exts-1.21.1
 - hie-bios-0.4.0
 - hlint-2.2.10
diff --git a/stack.yaml b/stack.yaml
index 6139467ba..3037a3d81 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -20,6 +20,9 @@ extra-deps:
     - haddock-api
 # - haddock-api-2.23.0
 - haddock-library-1.8.0
+- haskell-lsp-0.20.0.0
+- haskell-lsp-types-0.20.0.0
+- lsp-test-0.10.1.0
 - haskell-src-exts-1.21.1
 - hie-bios-0.4.0
 - hlint-2.2.10