diff --git a/cabal.project b/cabal.project
index ce0bd46ef..8103682ae 100644
--- a/cabal.project
+++ b/cabal.project
@@ -72,8 +72,6 @@ constraints:
   setup.happy == 1.20.1.1,
   happy == 1.20.1.1,
   filepath installed,
-  -- for ghc 8.10, stm-hamt 1.2.0.10 doesn't build
-  stm-hamt < 1.2.0.10,
   -- Centos 7 comes with an old gcc version that doesn't know about
   -- the flag '-fopen-simd', which blocked the release 2.2.0.0.
   -- We want to be able to benefit from the performance optimisations