diff --git a/proto-lens-optparse.cabal b/proto-lens-optparse.cabal
--- a/proto-lens-optparse.cabal
+++ b/proto-lens-optparse.cabal
@@ -1,5 +1,5 @@
 name:                proto-lens-optparse
-version:             0.1.0.0
+version:             0.1.0.1
 synopsis:            Adapting proto-lens to optparse-applicative ReadMs.
 description:
    A package adapting proto-lens to optparse-applicative ReadMs.
@@ -20,6 +20,6 @@
   hs-source-dirs: src
   exposed-modules:     Data.ProtoLens.Optparse
   build-depends:  proto-lens == 0.1.*
-                , base == 4.8.*
+                , base >= 4.8 && < 4.10
                 , optparse-applicative == 0.12.*
                 , text == 1.2.*