diff --git a/peregrin.cabal b/peregrin.cabal
--- a/peregrin.cabal
+++ b/peregrin.cabal
@@ -1,6 +1,6 @@
 Cabal-version:       2.2
 Name:                peregrin
-Version:             0.4.0
+Version:             0.4.1
 Synopsis:            Database migration support for use in other libraries.
 Description:         Database migration support for use in other libraries.
                      Currently only supports PostgreSQL.
@@ -18,7 +18,7 @@
 Library
   build-depends:      base >= 4.9 && < 5
                     , bytestring >= 0.10 && < 0.12
-                    , postgresql-simple >= 0.5.2.1 && < 0.7
+                    , postgresql-simple >= 0.5.2.1 && < 0.8
                     , text >= 2 && < 3
   default-language:   Haskell2010
   ghc-options:        -Wall
@@ -32,7 +32,7 @@
   main-is:            Main.hs
   build-depends:      base == 4.*
                     , pg-harness-client >= 0.6.0 && < 0.7.0
-                    , postgresql-simple >= 0.5.2.1 && < 0.7
+                    , postgresql-simple >= 0.5.2.1 && < 0.8
                     , resource-pool >= 0.2.1 && < 0.4
                     , text >= 1.0 && < 2
                     , transformers >= 0.5.2 && < 0.6