diff --git a/servant-matrix-param.cabal b/servant-matrix-param.cabal
--- a/servant-matrix-param.cabal
+++ b/servant-matrix-param.cabal
@@ -1,5 +1,5 @@
 name:           servant-matrix-param
-version:        0.1
+version:        0.1.0.1
 synopsis:       Matrix parameter combinator for servant
 description:    Matrix parameter combinator for servant
 category:       Web
@@ -31,7 +31,7 @@
       Servant.MatrixParam
   if flag(with-servant-aeson-specs)
     build-depends:
-        servant-aeson-specs == 0.2.* || == 0.3.*
+        servant-aeson-specs == 0.2.* || == 0.3.* || == 0.4.*
     exposed-modules:
         Servant.MatrixParam.AesonSpecs