diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,9 @@
 # ChangeLog for yesod-bin
 
+## 1.6.2
+
+* aeson 2.0
+
 ## 1.6.1
 
 Added command line options `cert` and `key` to allow TLS certificate and key files to be passed to `yesod devel` [#1717](https://github.com/yesodweb/yesod/pull/1717)
diff --git a/Keter.hs b/Keter.hs
--- a/Keter.hs
+++ b/Keter.hs
@@ -1,10 +1,16 @@
 {-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE CPP #-}
 module Keter
     ( keter
     ) where
 
 import Data.Yaml
+
+#if MIN_VERSION_aeson(2, 0, 0)
+import qualified Data.Aeson.KeyMap as Map
+#else
 import qualified Data.HashMap.Strict as Map
+#endif
 import qualified Data.Text as T
 import System.Environment (getEnvironment)
 import System.Exit
diff --git a/yesod-bin.cabal b/yesod-bin.cabal
--- a/yesod-bin.cabal
+++ b/yesod-bin.cabal
@@ -1,5 +1,5 @@
 name:            yesod-bin
-version:         1.6.1
+version:         1.6.2
 license:         MIT
 license-file:    LICENSE
 author:          Michael Snoyman <michael@snoyman.com>
@@ -61,6 +61,7 @@
                      , warp-tls           >= 3.0.1
                      , yaml               >= 0.8          && < 0.12
                      , zlib               >= 0.5
+                     , aeson
 
     ghc-options:       -Wall -threaded -rtsopts
     main-is:           main.hs