diff --git a/Data/Aeson/Types/Internal.hs b/Data/Aeson/Types/Internal.hs
--- a/Data/Aeson/Types/Internal.hs
+++ b/Data/Aeson/Types/Internal.hs
@@ -69,6 +69,7 @@
 import Data.ByteString.Builder (Builder, char7, toLazyByteString)
 import Data.Char (isLower, isUpper, toLower, isAlpha, isAlphaNum)
 import Data.Data (Data)
+import Data.Foldable (foldl')
 import Data.HashMap.Strict (HashMap)
 import Data.Hashable (Hashable(..))
 import Data.Semigroup (Semigroup((<>)))
@@ -384,7 +385,7 @@
 
 instance NFData Value where
     rnf (Object o) = rnf o
-    rnf (Array a)  = V.foldl' (\x y -> rnf y `seq` x) () a
+    rnf (Array a)  = foldl' (\x y -> rnf y `seq` x) () a
     rnf (String s) = rnf s
     rnf (Number n) = rnf n
     rnf (Bool b)   = rnf b
@@ -403,7 +404,7 @@
   where
     assocHashesSorted = sort [hash k `hashWithSalt` v | (k, v) <- H.toList o]
 #endif
-hashValue s (Array a)    = V.foldl' hashWithSalt
+hashValue s (Array a)    = foldl' hashWithSalt
                               (s `hashWithSalt` (1::Int)) a
 hashValue s (String str) = s `hashWithSalt` (2::Int) `hashWithSalt` str
 hashValue s (Number n)   = s `hashWithSalt` (3::Int) `hashWithSalt` n
diff --git a/aeson.cabal b/aeson.cabal
--- a/aeson.cabal
+++ b/aeson.cabal
@@ -1,5 +1,5 @@
 name:            aeson
-version:         0.11.1.3
+version:         0.11.1.4
 license:         BSD3
 license-file:    LICENSE
 category:        Text, Web, JSON
@@ -105,7 +105,7 @@
     text >= 1.1.1.0,
     transformers,
     unordered-containers >= 0.2.5.0,
-    vector >= 0.7.1
+    vector >= 0.8
 
   if !impl(ghc >= 8.0)
     -- `Data.Semigroup` is available in base only since GHC 8.0 / base 4.9
diff --git a/changelog.md b/changelog.md
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,9 @@
 For the latest version of this document, please see [https://github.com/bos/aeson/blob/master/changelog.md](https://github.com/bos/aeson/blob/master/changelog.md).
 
+#### 0.11.1.4
+
+* Fix build with `base >= 4.8` and `unordered-containers < 0.2.6`.
+
 #### 0.11.1.3
 
 * Fix build on TH-less GHCs