diff --git a/qr-imager.cabal b/qr-imager.cabal
--- a/qr-imager.cabal
+++ b/qr-imager.cabal
@@ -1,5 +1,5 @@
 name:                qr-imager
-version:             1.0.1.2
+version:             1.0.1.3
 synopsis:            Library to generate QR codes from bytestrings and objects
 description:         Please see README.md
 homepage:            https://github.com/vmchale/QRImager#readme
@@ -34,6 +34,7 @@
                      , process
                      , MissingH
                      , optparse-applicative
+                     , either < 5
   pkgconfig-depends:   libqrencode
   default-language:    Haskell2010