diff --git a/cabal.project b/cabal.project
index c182e65bf19..4c6098728af 100644
--- a/cabal.project
+++ b/cabal.project
@@ -30,6 +30,16 @@ package *
 
 write-ghc-environment-files: never
 
+source-repository-package
+  type: git
+  location: https://github.com/haskell/lsp
+  tag: 7cc05f3d1249d89af91e82e6aa654bb632045307
+  subdir: lsp-types
+  subdir: lsp
+  subdir: lsp-test
+-- To check if issues are caused by:
+-- https://github.com/haskell/lsp/pull/326
+
 index-state: 2021-05-21T05:01:41Z
 
 allow-newer: