diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,6 @@
+- 0.4.2.1
+    * Bump `ghc-prof` dependency to 1.4
+
 - 0.4.2.0
     * Use the new `ghc-prof` instead of our own hacky prof parser
     * Bump `aeson` dependency to 1.1
diff --git a/profiteur.cabal b/profiteur.cabal
--- a/profiteur.cabal
+++ b/profiteur.cabal
@@ -1,5 +1,5 @@
 Name:                profiteur
-Version:             0.4.2.0
+Version:             0.4.2.1
 Synopsis:            Treemap visualiser for GHC prof files
 Description:         Treemap visualiser for GHC prof files
 Homepage:            http://github.com/jaspervdj/profiteur
@@ -50,7 +50,7 @@
     bytestring           >= 0.9  && < 0.11,
     containers           >= 0.5  && < 0.6,
     filepath             >= 1.3  && < 1.5,
-    ghc-prof             >= 1.3  && < 1.4,
+    ghc-prof             >= 1.3  && < 1.5,
     js-jquery            >= 3.1  && < 3.2,
     scientific           >= 0.3  && < 0.4,
     text                 >= 0.11 && < 1.3,