diff --git a/grenade.cabal b/grenade.cabal
index 1e9b29a..087ab95 100644
--- a/grenade.cabal
+++ b/grenade.cabal
@@ -42,7 +42,7 @@ library
                      , containers                      >= 0.5         && < 0.7
                      , cereal                          >= 0.5         && < 0.6
                      , deepseq                         >= 1.4         && < 1.5
-                     , hmatrix                         == 0.18.*
+                     , hmatrix                         >= 0.18        && < 0.20
                      , MonadRandom                     >= 0.4         && < 0.6
                      , primitive                       >= 0.6         && < 0.7
                      -- Versions of singletons are *tightly* coupled with the