diff --git a/lambda-calculator.cabal b/lambda-calculator.cabal
--- a/lambda-calculator.cabal
+++ b/lambda-calculator.cabal
@@ -1,5 +1,5 @@
 name:                lambda-calculator
-version:             1.1.0
+version:             1.1.1
 synopsis:            A lambda calculus interpreter
 description:         Please see README.md
 homepage:            https://github.com/sgillespie/lambda-calculus#readme
@@ -36,7 +36,7 @@
   ghc-options:         -threaded -rtsopts -with-rtsopts=-N
   build-depends:       base,
                        lambda-calculator,
-                       optparse-applicative,
+                       optparse-applicative < 0.13,
                        Shellac,
                        Shellac-readline
   default-language:    Haskell2010