diff --git a/ChangeLog b/ChangeLog
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2022-08-30  Facundo Domínguez <facundo.dominguez@tweag.io> 0.5.6
+
+* Fix extension fields in the cabal file (#41).
+
 2022-08-09  Facundo Domínguez <facundo.dominguez@tweag.io> 0.5.5
 
 * Relax dependency bounds to build with ghc9 (#40).
diff --git a/network-transport.cabal b/network-transport.cabal
--- a/network-transport.cabal
+++ b/network-transport.cabal
@@ -1,5 +1,5 @@
 Name:          network-transport
-Version:       0.5.5
+Version:       0.5.6
 Cabal-Version: >=1.10
 Build-Type:    Simple
 License:       BSD3
@@ -75,7 +75,8 @@
   Exposed-Modules: Network.Transport,
                    Network.Transport.Util
                    Network.Transport.Internal
-  Other-Extensions: ForeignFunctionInterface,
+  Other-Extensions: ForeignFunctionInterface
+  Default-Extensions:
                    RankNTypes,
                    ScopedTypeVariables,
                    DeriveDataTypeable,