diff --git a/reactive-banana.cabal b/reactive-banana.cabal
--- a/reactive-banana.cabal
+++ b/reactive-banana.cabal
@@ -1,5 +1,5 @@
 Name:                reactive-banana
-Version:             0.7.1.2
+Version:             0.7.1.3
 Synopsis:            Practical library for functional reactive programming (FRP).
 Description:         
     Reactive-banana is a practical library for Functional Reactive Programming (FRP).
@@ -54,7 +54,7 @@
     build-depends:      base >= 4.2 && < 5,
                         containers >= 0.3 && < 0.6,
                         transformers >= 0.2 && < 0.4,
-                        vault == 0.2.*
+                        vault == 0.3.*
 
     extensions:         EmptyDataDecls,
                         BangPatterns
diff --git a/src/Reactive/Banana/Internal/Cached.hs b/src/Reactive/Banana/Internal/Cached.hs
--- a/src/Reactive/Banana/Internal/Cached.hs
+++ b/src/Reactive/Banana/Internal/Cached.hs
@@ -15,7 +15,7 @@
 import Control.Monad
 import Control.Monad.Fix
 import Data.Unique.Really
-import qualified Data.Vault as Vault
+import qualified Data.Vault.Lazy as Vault
 import System.IO.Unsafe
 
 {-----------------------------------------------------------------------------
diff --git a/src/Reactive/Banana/Internal/InputOutput.hs b/src/Reactive/Banana/Internal/InputOutput.hs
--- a/src/Reactive/Banana/Internal/InputOutput.hs
+++ b/src/Reactive/Banana/Internal/InputOutput.hs
@@ -22,7 +22,7 @@
 import Control.Exception (evaluate)
 
 import Data.Unique.Really
-import qualified Data.Vault  as Vault
+import qualified Data.Vault.Lazy  as Vault
 
 {-----------------------------------------------------------------------------
     Storing heterogenous input values
diff --git a/src/Reactive/Banana/Internal/PulseLatch0.hs b/src/Reactive/Banana/Internal/PulseLatch0.hs
--- a/src/Reactive/Banana/Internal/PulseLatch0.hs
+++ b/src/Reactive/Banana/Internal/PulseLatch0.hs
@@ -23,7 +23,7 @@
 
 import Data.Hashable
 import Data.Unique.Really
-import qualified Data.Vault as Vault
+import qualified Data.Vault.Lazy as Vault
 
 import Data.Functor.Identity
 import System.IO.Unsafe