diff --git a/proto-lens-combinators.cabal b/proto-lens-combinators.cabal
--- a/proto-lens-combinators.cabal
+++ b/proto-lens-combinators.cabal
@@ -1,5 +1,5 @@
 name:                proto-lens-combinators
-version:             0.1.0.0
+version:             0.1.0.1
 synopsis:            Utilities functions to proto-lens.
 description:
   Useful things for working with protos.
@@ -22,10 +22,10 @@
   build-depends:  proto-lens == 0.1.*
                 -- Used by the custom Setup script (for the test-suite).
                 , proto-lens-protoc == 0.1.*
-                , base == 4.8.*
+                , base >= 4.8 && < 4.10
                 , data-default-class == 0.0.*
                 , lens-family == 1.2.*
-                , transformers == 0.4.*
+                , transformers >= 0.4 && < 0.6
 
 Test-Suite combinators_test
   default-language: Haskell2010