diff --git a/grid.cabal b/grid.cabal
--- a/grid.cabal
+++ b/grid.cabal
@@ -1,5 +1,5 @@
 Name:              grid
-Version:           7.8.0
+Version:           7.8.1
 Stability:         experimental
 Synopsis:          Tools for working with regular grids (graphs, lattices).
 Description:       Provides tools for working with regular arrangements
@@ -27,12 +27,12 @@
 source-repository this
   type:     git
   location: https://github.com/mhwombat/grid.git
-  tag:      7.8.0
+  tag:      7.8.1
 
 
 library
   hs-source-dirs:  src
-  build-depends:   base ==4.*,
+  build-depends:   base ==4.* && >= 4.8,
                    cereal ==0.4.*,
                    containers ==0.5.*
   ghc-options:     -Wall
@@ -53,7 +53,7 @@
 
 test-suite grid-tests
   type:            exitcode-stdio-1.0
-  build-depends:   base ==4.*,
+  build-depends:   base ==4.* && >= 4.8,
                    containers ==0.5.*,
                    test-framework-quickcheck2 ==0.3.*,
                    QuickCheck ==2.7.*,