diff --git a/stm-hamt.cabal b/stm-hamt.cabal
--- a/stm-hamt.cabal
+++ b/stm-hamt.cabal
@@ -1,5 +1,5 @@
 name:          stm-hamt
-version:       1.2.0.10
+version:       1.2.0.11
 synopsis:      STM-specialised Hash Array Mapped Trie
 description:
   A low-level data-structure,
@@ -78,7 +78,7 @@
       base >=4.9 && <5
     , deferred-folds >=0.9 && <0.10
     , focus >=1 && <1.1
-    , hashable <2
+    , hashable >=1.4.0.0 && <2
     , list-t >=1.0.1 && <1.1
     , primitive >=0.7 && <0.9
     , primitive-extras >=0.10 && <0.11