Index: b/config-ini.cabal
===================================================================
--- a/config-ini.cabal
+++ b/config-ini.cabal
@@ -1,5 +1,6 @@
 name:             config-ini
 version:          0.2.7.0
+x-revision: 1
 synopsis:         A library for simple INI-based configuration files.
 homepage:         https://github.com/aisamanra/config-ini
 bug-reports:      https://github.com/aisamanra/config-ini/issues
@@ -47,7 +48,7 @@ library
   if impl(ghc > 8.0)
     ghc-options:       -fno-warn-redundant-constraints
   build-depends:       base                  >=4.8   && <5
-                     , containers            >=0.5   && <0.7
+                     , containers            >=0.5   && <0.8
                      , text                  >=1.2.2 && <3
                      , unordered-containers  >=0.2.7 && <0.5
                      , transformers          >=0.4.1 && <0.7
