diff --git a/app-settings.cabal b/app-settings.cabal
--- a/app-settings.cabal
+++ b/app-settings.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                app-settings
-version:             0.2.0.11
+version:             0.2.0.12
 synopsis:            A library to manage application settings (INI file-like)
 description:
   A library to deal with application settings.
@@ -114,7 +114,7 @@
   -- other-extensions:
   build-depends:       base >=4.6 && <5,
                        mtl >= 2.1 && <2.3,
-                       containers == 0.5.*,
+                       containers >= 0.5 && <0.7,
                        directory >= 1.2 && < 1.4,
                        text >= 0.10,
                        parsec == 3.1.*
@@ -131,7 +131,7 @@
                        hspec,
                        HUnit >= 1.2 && <1.7,
                        mtl >= 2.1 && <2.3,
-                       containers == 0.5.*,
+                       containers >= 0.5 && <0.7,
                        directory >= 1.2 && < 1.4,
                        text >= 0.10,
                        parsec == 3.1.*