diff --git a/container.cabal b/container.cabal
--- a/container.cabal
+++ b/container.cabal
@@ -1,11 +1,11 @@
--- This file has been generated from package.yaml by hpack version 0.20.0.
+-- This file has been generated from package.yaml by hpack version 0.28.2.
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: eeed6fa2782121490ea5a84015d54a47965afd50cbd620616f3c4229d30e6ab2
+-- hash: f60ad1883f3f7d2905891ca5b288cce7361636fe21c906a2c62163c10f52f009
 
 name:           container
-version:        1.1.1
+version:        1.1.2
 synopsis:       Containers abstraction and utilities.
 category:       Data
 stability:      experimental
@@ -30,6 +30,7 @@
     , convert
     , lens
     , text
+    , vector
   exposed-modules:
       Data.Item
       Data.List.Class
diff --git a/src/Data/Item.hs b/src/Data/Item.hs
--- a/src/Data/Item.hs
+++ b/src/Data/Item.hs
@@ -6,6 +6,7 @@
 import qualified Data.Map.Strict as MapStrict
 import qualified Data.Text       as Strict
 import qualified Data.Text.Lazy  as Lazy
+import qualified Data.Vector     as Vector
 
 import Data.Set (Set)
 
@@ -18,3 +19,4 @@
 type instance Item Strict.Text         = Char
 type instance Item Lazy.Text           = Char
 type instance Item (Set a)             = a
+type instance Item (Vector.Vector a)   = a