diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,7 @@
+## 3.0.0.3
+
+Allow blaze-builder 0.4
+
 ## 3.0.0.2
 
 * Support for Win64
diff --git a/wai-handler-launch.cabal b/wai-handler-launch.cabal
--- a/wai-handler-launch.cabal
+++ b/wai-handler-launch.cabal
@@ -1,5 +1,5 @@
 Name:                wai-handler-launch
-Version:             3.0.0.2
+Version:             3.0.0.3
 Synopsis:            Launch a web app in the default browser.
 description:         API docs and the README are available at <http://www.stackage.org/package/wai-handler-launch>.
 License:             MIT
@@ -19,7 +19,7 @@
                    , http-types              >= 0.7
                    , transformers            >= 0.2.2
                    , bytestring              >= 0.9.1.4
-                   , blaze-builder           >= 0.2.1.4 && < 0.4
+                   , blaze-builder           >= 0.2.1.4 && < 0.5
                    , streaming-commons
 
     if os(windows)