diff --git a/creatur.cabal b/creatur.cabal
--- a/creatur.cabal
+++ b/creatur.cabal
@@ -1,5 +1,5 @@
 name: creatur
-version: 5.9.18
+version: 5.9.19
 cabal-version: >=1.8
 build-type: Simple
 license: BSD3
@@ -59,7 +59,7 @@
         ALife.Creatur.Util
     build-depends:
         array >=0.5.1.1 && <0.6,
-        base ==4.9.*,
+        base ==4.9.* || ==4.10.*,
         binary >=0.8.3.0 && <0.9,
         bytestring >=0.10.8.1 && <0.11,
         cond >=0.4.1.1 && <0.5,
@@ -90,7 +90,7 @@
     main-is: TestAll.hs
     build-depends:
         array >=0.5.1.1 && <0.6,
-        base ==4.9.*,
+        base ==4.9.* || ==4.10.*,
         binary >=0.8.3.0 && <0.9,
         cereal >=0.5.4.0 && <0.6,
         creatur,