diff --git a/mpppc.cabal b/mpppc.cabal
--- a/mpppc.cabal
+++ b/mpppc.cabal
@@ -1,5 +1,5 @@
 name:                mpppc
-version:             0.1.0
+version:             0.1.1
 stability:           experimental
 description:         Multi-dimensional parametric pretty-printer with color
 synopsis:            Multi-dimensional parametric pretty-printer with color
@@ -15,7 +15,7 @@
 
 library
   build-depends:     ansi-terminal >= 0.5   && <= 0.6
-                   , base          >= 3.0   && <= 4.0
+                   , base          >= 4.0   && <= 5.0
                    , bytestring    >= 0.9.1 && <= 0.9.2
                    , split         >= 0.1.1 && <= 0.2
                    , text          >= 0.5   && <= 0.6
@@ -31,7 +31,7 @@
   exposed-modules: Text.PrettyPrint.MPPPC.OneDim
                    Text.PrettyPrint.MPPPC.TwoDim
 
-  ghc-options:     -Wall -fwarn-tabs -funbox-strict-fields -O2
+  ghc-options:     -Wall -fwarn-tabs -funbox-strict-fields
 
   hs-source-dirs:  src