diff --git a/bench/bench.hs b/bench/bench.hs
--- a/bench/bench.hs
+++ b/bench/bench.hs
@@ -1,3 +1,5 @@
+{-# language OverloadedStrings #-}
+
 module Main (main) where
 
 import Control.Lens ((&), (.~))
@@ -23,6 +25,7 @@
       , bench "read double" $ nf (pd (D.read :: Decode' BS.ByteString Double)) doublesC
       , bench "float" $ nf (pd D.float) doublesC
       , bench "read float" $ nf (pd (D.read :: Decode' BS.ByteString Float)) doublesC
+      , bench "many" $ nf (parseDecode (D.utf8 <* many D.utf8) opts) "a\na"
       ]
 
 doubles :: LBS.ByteString
diff --git a/changelog.md b/changelog.md
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,9 @@
 # Revision history for sv
 
+## 1.4 -- 2019-08-13
+
+* Update to sv-core 0.5
+
 ## 1.3.1 -- 2019-04-02
 
 * Update to sv-core 0.4.1
diff --git a/sv.cabal b/sv.cabal
--- a/sv.cabal
+++ b/sv.cabal
@@ -1,5 +1,5 @@
 name:                sv
-version:             1.3.1
+version:             1.4
 license:             BSD3
 license-file:        LICENCE
 author:              George Wilson
@@ -73,11 +73,10 @@
 build-type:          Simple
 extra-source-files:  changelog.md
 cabal-version:       >=1.10
-tested-with:         GHC == 7.10.3
-                     , GHC == 8.0.2
+tested-with:         GHC == 8.0.2
                      , GHC == 8.2.2
                      , GHC == 8.4.4
-                     , GHC == 8.6.4
+                     , GHC == 8.6.5
 
 source-repository    head
   type:              git
@@ -91,17 +90,17 @@
                        , Data.Sv.Structure
   other-modules:       Data.Sv.Alien.Cassava
   -- other-extensions:    
-  build-depends:       base >=4.8 && < 4.13
+  build-depends:       base >=4.9 && < 4.13
                        , attoparsec >= 0.12.1.4 && < 0.14
                        , bifunctors >= 5.1 && < 5.6
                        , bytestring >= 0.9.1.10 && < 0.11
                        , contravariant >= 1.2 && < 1.6
                        , hw-dsv >= 0.2.1 && < 0.4
                        , semigroupoids >= 5 && < 5.4
-                       , sv-core == 0.4.1.*
+                       , sv-core == 0.5.*
                        , transformers >= 0.2 && < 0.6
                        , utf8-string >= 1 && < 1.1
-                       , validation >= 1 && < 1.1
+                       , validation >= 1 && < 1.2
   hs-source-dirs:      src
   default-language:    Haskell2010
   ghc-options:
@@ -120,24 +119,24 @@
   default-language:
                        Haskell2010
   build-depends:
-                       base >=4.8 && < 4.13
+                       base >=4.9 && < 4.13
                        , bytestring >= 0.9.1.10 && < 0.11
                        , cassava >= 0.4.1 && < 0.6
                        , contravariant >= 1.2 && < 1.6
-                       , hedgehog >= 0.5 && < 0.7
+                       , hedgehog >= 0.5 && < 1.1
                        , lens >= 4 && < 4.18
                        , parsers >=0.12 && <0.13
                        , Only >= 0.1 && < 0.2
                        , semigroupoids >= 5 && < 5.4
-                       , semigroups >= 0.18 && < 0.19
+                       , semigroups >= 0.18 && < 0.20
                        , sv
                        , tasty >= 0.11 && < 1.3
-                       , tasty-hedgehog >= 0.1 && < 0.3
+                       , tasty-hedgehog >= 0.1 && < 1.1
                        , tasty-hunit >= 0.9 && < 0.11
                        , text >= 1.0 && < 1.3
                        , trifecta >= 1.5 && < 2.1
                        , utf8-string >= 1 && < 1.1
-                       , validation >= 1 && < 1.1
+                       , validation >= 1 && < 1.2
                        , vector >= 0.10 && < 0.13
   ghc-options:
                        -Wall
@@ -153,7 +152,7 @@
                        Haskell2010
   build-depends:
                          attoparsec >= 0.12.1.4 && < 0.14
-                       , base >=4.8 && < 4.13
+                       , base >=4.9 && < 4.13
                        , bytestring >= 0.9.1.10 && < 0.11
                        , criterion >= 1.3 && < 1.6
                        , deepseq >= 1.1 && < 1.5