diff --git a/.travis.yml b/.travis.yml
index 8fb9020..c3771f3 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -22,6 +22,14 @@ matrix:
     compiler: ": #stack 8.2.1"
     addons: { apt: { packages: [libgmp-dev] } }
 
+  - env: ARGS="--resolver lts-11"
+    compiler: ": #stack 8.2.2"
+    addons: { apt: { packages: [libgmp-dev] } }
+
+  - env: ARGS="--resolver lts-12"
+    compiler: ": #stack 8.4.3"
+    addons: { apt: { packages: [libgmp-dev] } }
+
   - env: ARGS="--resolver nightly"
     compiler: ": #stack nightly"
     addons: { apt: { packages: [libgmp-dev] } }
diff --git a/bench/Core.hs b/bench/Core.hs
index a19d55f..1fa957f 100644
--- a/bench/Core.hs
+++ b/bench/Core.hs
@@ -55,8 +55,8 @@ 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)
+countDownExcEE start = EE.run $ EE.runError (EE.runState start go)
+  where go = EE.get >>= (\n -> if n <= (0 :: Int) then EE.throwError "wat" else EE.put (n-1) >> go)
 
 --------------------------------------------------------------------------------
                           -- Freer: Interpreter --
diff --git a/package.yaml b/package.yaml
index b89e9dd..bd63967 100644
--- a/package.yaml
+++ b/package.yaml
@@ -83,7 +83,7 @@ benchmarks:
     ghc-options: -O2
     dependencies:
     - criterion
-    - extensible-effects < 2
+    - extensible-effects
     - free
     - freer-simple
     - mtl
diff --git a/stack.yaml b/stack.yaml
index 1f98618..1af3bf0 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,10 +1,10 @@
-resolver: lts-10.5
+resolver: lts-12.8
 
 packages:
 - '.'
 
 extra-deps:
-- extensible-effects-1.11.1.0
+- extensible-effects-3.1.0.0
 
 flags: {}
 extra-package-dbs: []