diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,3 +1,7 @@
+## 0.11.1.1
+
+* Compatibility with time >= 1.5 [#100](https://github.com/snoyberg/classy-prelude/pull/100)
+
 ## 0.11.1
 
 * Fix deprecation warnings for `elem`
diff --git a/ClassyPrelude.hs b/ClassyPrelude.hs
--- a/ClassyPrelude.hs
+++ b/ClassyPrelude.hs
@@ -212,7 +212,7 @@
     , parseTime
     , getCurrentTime
     )
-import System.Locale (defaultTimeLocale)
+import Data.Time.Locale.Compat (defaultTimeLocale)
 
 import qualified Data.Set as Set
 import qualified Data.Map as Map
@@ -427,8 +427,8 @@
 sortWith f = sortBy $ comparing f
 
 -- | We define our own 'undefined' which is marked as deprecated. This makes it
--- useful to use during development, but let's you more easily getting
--- notification if you accidentally ship partial code in production.
+-- useful to use during development, but lets you more easily get
+-- notifications if you accidentally ship partial code in production.
 --
 -- The classy prelude recommendation for when you need to really have a partial
 -- function in production is to use 'error' with a very descriptive message so
diff --git a/classy-prelude.cabal b/classy-prelude.cabal
--- a/classy-prelude.cabal
+++ b/classy-prelude.cabal
@@ -1,5 +1,5 @@
 name:                classy-prelude
-version:             0.11.1
+version:             0.11.1.1
 synopsis:            A typeclass-based Prelude.
 description:         Modern best practices without name collisions. No partial functions are exposed, but modern data structures are, without requiring import lists. Qualified modules also are not needed: instead operations are based on type-classes from the mono-traversable package.
 
@@ -30,8 +30,8 @@
                      , exceptions                    >= 0.5
                      , semigroups
                      , vector-instances
-                     , old-locale
                      , time
+                     , time-locale-compat
                      , chunked-data
                      , enclosed-exceptions
                      , ghc-prim