diff --git a/changelog.md b/changelog.md
--- a/changelog.md
+++ b/changelog.md
@@ -1,7 +1,10 @@
 The [latest version](https://github.com/blockscope/hpack-dhall/blob/master/changelog.md) of this changelog.
 
+## 0.5.6 - Relax hpack version upper bound
+* Relax hpack bounds to `hpack >= 0.34.7` for stackage build.
+
 ## 0.5.5 - Bump hpack and test versions
-* Require `hpack >= 0.34.7`.
+* Require `hpack ^>= 0.34.7`.
 * Test with GHC `8.8.4`, GHC `8.10.7`, GHC `9.0.2` and GHC `9.2.2`.
 
 ## 0.5.4 - Bump hpack and test versions
diff --git a/hpack-dhall.cabal b/hpack-dhall.cabal
--- a/hpack-dhall.cabal
+++ b/hpack-dhall.cabal
@@ -5,7 +5,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           hpack-dhall
-version:        0.5.5
+version:        0.5.6
 synopsis:       hpack's dhalling
 description:    Use hpack phrasing in dhall to write cabal files.
                 .
@@ -136,7 +136,7 @@
     , dhall >=1.41.1
     , dhall-json >=1.7.10
     , filepath
-    , hpack >=0.34.7 && <0.35
+    , hpack >=0.34.7
     , megaparsec >=9.2
     , microlens
     , prettyprinter
@@ -165,7 +165,7 @@
     , dhall >=1.41.1
     , dhall-json >=1.7.10
     , filepath
-    , hpack >=0.34.7 && <0.35
+    , hpack >=0.34.7
     , megaparsec >=9.2
     , microlens
     , optparse-applicative
@@ -195,7 +195,7 @@
     , dhall >=1.41.1
     , dhall-json >=1.7.10
     , filepath
-    , hpack >=0.34.7 && <0.35
+    , hpack >=0.34.7
     , megaparsec >=9.2
     , microlens
     , optparse-applicative
@@ -225,7 +225,7 @@
     , dhall >=1.41.1
     , dhall-json >=1.7.10
     , filepath
-    , hpack >=0.34.7 && <0.35
+    , hpack >=0.34.7
     , megaparsec >=9.2
     , microlens
     , optparse-applicative
@@ -255,7 +255,7 @@
     , dhall >=1.41.1
     , dhall-json >=1.7.10
     , filepath
-    , hpack >=0.34.7 && <0.35
+    , hpack >=0.34.7
     , megaparsec >=9.2
     , microlens
     , optparse-applicative
@@ -287,7 +287,7 @@
     , dhall-json >=1.7.10
     , directory
     , filepath
-    , hpack >=0.34.7 && <0.35
+    , hpack >=0.34.7
     , megaparsec >=9.2
     , microlens
     , prettyprinter
diff --git a/package.dhall b/package.dhall
--- a/package.dhall
+++ b/package.dhall
@@ -6,7 +6,7 @@
       , "dhall >= 1.41.1"
       , "dhall-json >= 1.7.10"
       , "filepath"
-      , "hpack ^>= 0.34.7"
+      , "hpack >= 0.34.7"
       , "megaparsec >= 9.2"
       , "microlens"
       , "prettyprinter"
@@ -18,7 +18,7 @@
 in  let exe-deps = [ "optparse-applicative" ]
 
     in  { name = "hpack-dhall"
-        , version = "0.5.5"
+        , version = "0.5.6"
         , maintainer = "Phil de Joux <phil.dejoux@blockscope.com>"
         , copyright =
             "© 2018 - 2022 Phil de Joux, © 2018 - 2022 Block Scope Limited"