diff --git a/cabal.project b/cabal.project
index e0513c8b2294e178739820cfe4205823924df7ab..2cf09f2ab1b87f60dcc3d332674fb5be62e96634 100644
--- a/cabal.project
+++ b/cabal.project
@@ -28,7 +28,6 @@ source-repository-package
   location: https://github.com/mpickering/ghc-events.git
   tag: 0d8a89d7b9f8f4600eba4f6e6c089d97a25d2295
 
-index-state: 2020-12-29T18:00:00Z
 
 package haxl
   ghc-options: -w