diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# `nix-diff 1.0.3`
+# `nix-diff 1.0.4`
 
 This package provides a `nix-diff` executable which explains why two Nix
 derivations differ.  The most common use cases for this are:
diff --git a/nix-diff.cabal b/nix-diff.cabal
--- a/nix-diff.cabal
+++ b/nix-diff.cabal
@@ -1,5 +1,5 @@
 name:                nix-diff
-version:             1.0.3
+version:             1.0.4
 synopsis:            Explain why two Nix derivations differ
 description:         This package provides a @nix-diff@ executable which
                      explains why two Nix derivations (i.e. @*.drv@ files)
@@ -18,7 +18,7 @@
 
 executable nix-diff
   main-is:             Main.hs
-  build-depends:       base             >= 4.9  && < 4.11
+  build-depends:       base             >= 4.9  && < 5
                      , attoparsec       >= 0.13 && < 0.14
                      , containers       >= 0.5  && < 0.6
                      , Diff             >= 0.3  && < 0.4