diff --git a/hls-test-utils/hls-test-utils.cabal b/hls-test-utils/hls-test-utils.cabal
index 79533a6b2d..3715d1a2b4 100644
--- a/hls-test-utils/hls-test-utils.cabal
+++ b/hls-test-utils/hls-test-utils.cabal
@@ -5,9 +5,7 @@ synopsis:      Utilities used in the tests of Haskell Language Server
 description:
   Please see the README on GitHub at <https://github.com/haskell/haskell-language-server#readme>
 
-homepage:
-  https://github.com/haskell/haskell-language-server#readme
-
+homepage:      https://github.com/haskell/haskell-language-server#readme
 bug-reports:   https://github.com/haskell/haskell-language-server/issues
 license:       Apache-2.0
 license-file:  LICENSE
@@ -35,7 +33,7 @@ library
   build-depends:
     , aeson
     , async
-    , base
+    , base                    >=4.12     && <5
     , blaze-markup
     , bytestring
     , containers