--- a/RSA.cabal
+++ b/RSA.cabal
@@ -21,7 +21,7 @@ Library
   hs-source-dirs:  src
   build-depends:   base                >= 4.6     && < 7.0,
                    binary              >  0.7     && < 1.0,
-                   bytestring          >  0.8     && < 0.12,
+                   bytestring          >  0.8     && < 0.13,
                    crypto-api          >= 0.10    && < 0.14,
                    crypto-pubkey-types >= 0.2     && < 0.6,
                    SHA                 >= 1.6.4.1 && < 2.0
@@ -40,7 +40,7 @@ test-suite test-rsa
   other-modules:  Codec.Crypto.RSA.Pure
   build-depends:  base                       >= 4.6     && < 7.0,
                   binary                     >  0.7     && < 1.0,
-                  bytestring                 >  0.8     && < 0.12,
+                  bytestring                 >  0.8     && < 0.13,
                   crypto-api                 >= 0.10    && < 0.14,
                   crypto-pubkey-types        >= 0.4     && < 0.6,
                   QuickCheck                 >= 2.5     && < 3,
