diff --git a/edge.cabal b/edge.cabal
--- a/edge.cabal
+++ b/edge.cabal
@@ -7,7 +7,7 @@
 -- The package version. See the Haskell package versioning policy
 -- (http://www.haskell.org/haskellwiki/Package_versioning_policy) for
 -- standards guiding when and how versions should be incremented.
-Version:             0.8.12
+Version:             0.8.12.1
 
 -- A short (one-line) description of the package.
 Synopsis:            Top view space combat arcade game
@@ -64,7 +64,7 @@
   Build-depends:     gloss >= 1.7.4.1 && < 1.8
                      , wraparound >= 0.0.1.1 && < 0.1
                      , base >= 4 && < 5
-                     , containers >= 0.4.2.1 && < 0.5
+                     , containers >= 0.4.2.1 && < 0.6
                      , ALUT >= 2.2 && < 2.3
                      , random >= 1.0.1.1 && < 1.1