diff --git a/bench/Core.hs b/bench/Core.hs
index 7861f40..7ba01cd 100644
--- a/bench/Core.hs
+++ b/bench/Core.hs
@@ -39,6 +39,10 @@ import Control.Monad.Freer.Exception (runError, throwError)
 import Control.Monad.Freer.State (get, put, runState)
 import Control.Monad.Freer.StateRW (ask, tell, runStateR)
 
+import qualified Control.Eff as EE
+import qualified Control.Eff.Exception as EE
+import qualified Control.Eff.State.Lazy as EE
+
 --------------------------------------------------------------------------------
                         -- State Benchmarks --
 --------------------------------------------------------------------------------
@@ -49,18 +53,25 @@ oneGet = run . runState get
 oneGetMTL :: Int -> (Int, Int)
 oneGetMTL = MTL.runState MTL.get
 
-countDown :: Int -> (Int,Int)
+oneGetEE :: Int -> (Int, Int)
+oneGetEE n = EE.run $ EE.runState n EE.get
+
+countDown :: Int -> (Int, Int)
 countDown start = run (runState go start)
   where go = get >>= (\n -> if n <= 0 then pure n else put (n-1) >> go)
 
-countDownRW :: Int -> (Int,Int)
+countDownRW :: Int -> (Int, Int)
 countDownRW start = run (runStateR go start)
   where go = ask >>= (\n -> if n <= 0 then pure n else tell (n-1) >> go)
 
-countDownMTL :: Int -> (Int,Int)
+countDownMTL :: Int -> (Int, Int)
 countDownMTL = MTL.runState go
   where go = MTL.get >>= (\n -> if n <= 0 then pure n else MTL.put (n-1) >> go)
 
+countDownEE :: Int -> (Int, Int)
+countDownEE start = EE.run $ EE.runState start go
+  where go = EE.get >>= (\n -> if n <= 0 then pure n else EE.put (n-1) >> go)
+
 --------------------------------------------------------------------------------
                        -- Exception + State --
 --------------------------------------------------------------------------------
@@ -72,6 +83,10 @@ countDownExcMTL :: Int -> Either String (Int,Int)
 countDownExcMTL = MTL.runStateT go
   where go = MTL.get >>= (\n -> if n <= (0 :: Int) then MTL.throwError "wat" else MTL.put (n-1) >> go)
 
+countDownExcEE :: Int -> Either String (Int,Int)
+countDownExcEE start = EE.run $ EE.runExc (EE.runState start go)
+  where go = EE.get >>= (\n -> if n <= (0 :: Int) then EE.throwExc "wat" else EE.put (n-1) >> go)
+
 --------------------------------------------------------------------------------
                           -- Freer: Interpreter --
 --------------------------------------------------------------------------------
@@ -154,15 +169,18 @@ main =
     bgroup "State" [
         bench "freer.get"          $ whnf oneGet 0
       , bench "mtl.get"            $ whnf oneGetMTL 0
+      , bench "ee.get"             $ whnf oneGetEE 0
     ],
     bgroup "Countdown Bench" [
         bench "freer.State"    $ whnf countDown 10000
       , bench "freer.StateRW"  $ whnf countDownRW 10000
       , bench "mtl.State"      $ whnf countDownMTL 10000
+      , bench "ee.State"       $ whnf countDownEE 10000
     ],
     bgroup "Countdown+Except Bench" [
         bench "freer.ExcState"  $ whnf countDownExc 10000
       , bench "mtl.ExceptState" $ whnf countDownExcMTL 10000
+      , bench "ee.ExcState"     $ whnf countDownExcEE 10000
     ],
     bgroup "HTTP Simple DSL" [
         bench "freer" $ whnf (run . runHttp) prog
diff --git a/freer-effects.cabal b/freer-effects.cabal
index b07e315..ffefdbe 100644
--- a/freer-effects.cabal
+++ b/freer-effects.cabal
@@ -179,11 +179,12 @@ benchmark core
   default-language:     Haskell2010
 
   build-depends:
-      base
-    , criterion
-    , free
-    , freer-effects
-    , mtl
+                base
+              , criterion
+              , free
+              , freer-effects
+              , mtl
+              , extensible-effects >= 1.11 && < 1.12
 
   ghc-options:          -Wall -O2