diff --git a/deferred-folds.cabal b/deferred-folds.cabal
--- a/deferred-folds.cabal
+++ b/deferred-folds.cabal
@@ -1,6 +1,6 @@
 cabal-version: 3.0
 name:          deferred-folds
-version:       0.9.18.7
+version:       0.9.18.8
 category:      Folding
 synopsis:      Abstractions over deferred folds
 description:
@@ -81,7 +81,7 @@
   build-depends:
     , base >=4.9 && <5
     , bytestring >=0.10 && <0.13
-    , containers >=0.5 && <0.8
+    , containers >=0.5 && <0.9
     , foldl >=1 && <2
     , hashable >=1 && <2
     , primitive >=0.6.4 && <0.10