diff --git a/haskell-tools-demo.cabal b/haskell-tools-demo.cabal
--- a/haskell-tools-demo.cabal
+++ b/haskell-tools-demo.cabal
@@ -1,5 +1,5 @@
 name:                haskell-tools-demo
-version:             0.7.0.1
+version:             0.7.0.2
 synopsis:            A web-based demo for Haskell-tools Refactor.
 description:         Allows websocket clients to connect and performs refactorings on demand. The clients maintain a continous connection with the server, sending changes in the source files. When a refactor request is received, it performs the changes and sends the modified source files to the client.
 homepage:            https://github.com/haskell-tools/haskell-tools
@@ -26,7 +26,7 @@
                      , http-types                >= 0.9  && < 0.10
                      , warp                      >= 3.2  && < 3.3
                      , wai                       >= 3.2  && < 3.3
-                     , websockets                >= 0.10  && < 0.11
+                     , websockets                >= 0.10  && < 0.12
                      , wai-websockets            >= 3.0  && < 3.1
                      , references                >= 0.3  && < 0.4
                      , ghc                       >= 8.0.2  && < 8.1