diff --git a/slack-web.cabal b/slack-web.cabal
--- a/slack-web.cabal
+++ b/slack-web.cabal
@@ -1,8 +1,8 @@
 name: slack-web
-version: 0.2.0.6
+version: 0.2.0.7
 
 build-type: Simple
-cabal-version: >= 1.21
+cabal-version: 1.21
 
 license: MIT
 license-file: LICENSE.md
@@ -45,7 +45,7 @@
       Web.Slack.Util
   build-depends:
       aeson >= 1.0 && < 1.5
-    , base >= 4.9 && < 4.12
+    , base >= 4.9 && < 4.13
     , containers
     , http-api-data >= 0.3 && < 0.4
     , http-client >= 0.5 && < 0.6
@@ -79,7 +79,7 @@
       Web.Slack.MessageParserSpec
       Web.Slack.Types
   build-depends:
-      base >= 4.9 && < 4.12
+      base >= 4.9 && < 4.13
     , containers
     , aeson
     , errors