diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Changelog
 
+#### 0.2.10.4
+
+* Allow `happstack-server == 7.4.*`
+
 #### 0.2.10.3
 
 * Bump `rest-types` and `rest-core`
diff --git a/rest-happstack.cabal b/rest-happstack.cabal
--- a/rest-happstack.cabal
+++ b/rest-happstack.cabal
@@ -1,5 +1,5 @@
 name:                rest-happstack
-version:             0.2.10.3
+version:             0.2.10.4
 description:         Rest driver for Happstack.
 synopsis:            Rest driver for Happstack.
 maintainer:          code@silk.co
@@ -26,7 +26,7 @@
   build-depends:
       base == 4.*
     , containers >= 0.4 && < 0.6
-    , happstack-server >= 7.0.5 && < 7.4
+    , happstack-server >= 7.0.5 && < 7.5
     , mtl >= 2.0 && < 2.3
     , rest-core >= 0.31 && < 0.34
     , rest-gen >= 0.14 && < 0.17