diff --git a/.travis.yml b/.travis.yml
index 28a61c0..c39bb0e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,7 +5,8 @@ node_js: stable
 env:
   - PATH=$HOME/purescript:$PATH
 install:
-  - TAG=$(basename $(curl --location --silent --output /dev/null -w %{url_effective} https://github.com/purescript/purescript/releases/latest))
+  # - TAG=$(basename $(curl --location --silent --output /dev/null -w %{url_effective} https://github.com/purescript/purescript/releases/latest))
+  - TAG=v0.14.0-rc3
   - curl --location --output $HOME/purescript.tar.gz https://github.com/purescript/purescript/releases/download/$TAG/linux64.tar.gz
   - tar -xvf $HOME/purescript.tar.gz -C $HOME/
   - chmod a+x $HOME/purescript
diff --git a/bower.json b/bower.json
index abf3504..14e47cc 100644
--- a/bower.json
+++ b/bower.json
@@ -16,15 +16,15 @@
     "package.json"
   ],
   "dependencies": {
-    "purescript-control": "^4.0.0",
-    "purescript-foldable-traversable": "^4.0.0",
-    "purescript-maybe": "^4.0.0",
-    "purescript-prelude": "^4.0.0",
-    "purescript-tuples": "^5.0.0",
-    "purescript-unfoldable": "^4.0.0"
+    "purescript-control": "master",
+    "purescript-foldable-traversable": "master",
+    "purescript-maybe": "master",
+    "purescript-prelude": "master",
+    "purescript-tuples": "master",
+    "purescript-unfoldable": "master"
   },
   "devDependencies": {
-    "purescript-assert": "^4.0.0",
-    "purescript-console": "^4.0.0"
+    "purescript-assert": "master",
+    "purescript-console": "master"
   }
 }
diff --git a/package.json b/package.json
index d408361..1fac874 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
   },
   "devDependencies": {
     "pulp": "^15.0.0",
-    "purescript-psa": "^0.6.0",
+    "purescript-psa": "^0.8.0",
     "rimraf": "^2.6.2"
   }
 }
diff --git a/src/Data/NonEmpty.purs b/src/Data/NonEmpty.purs
index 957b88c..9e5f75a 100644
--- a/src/Data/NonEmpty.purs
+++ b/src/Data/NonEmpty.purs
@@ -20,7 +20,7 @@ import Data.Eq (class Eq1)
 import Data.Foldable (class Foldable, foldl, foldr, foldMap)
 import Data.FoldableWithIndex (class FoldableWithIndex, foldMapWithIndex, foldlWithIndex, foldrWithIndex)
 import Data.FunctorWithIndex (class FunctorWithIndex, mapWithIndex)
-import Data.Maybe (Maybe(..))
+import Data.Maybe (Maybe(..), maybe)
 import Data.Ord (class Ord1)
 import Data.Semigroup.Foldable (class Foldable1, foldMap1)
 import Data.Traversable (class Traversable, traverse, sequence)
@@ -107,6 +107,8 @@ instance traversableWithIndexNonEmpty
 instance foldable1NonEmpty :: Foldable f => Foldable1 (NonEmpty f) where
   fold1 = foldMap1 identity
   foldMap1 f (a :| fa) = foldl (\s a1 -> s <> f a1) (f a) fa
+  foldr1 f (a :| fa) = maybe a (f a) $ foldr (\a1 -> Just <<< maybe a1 (f a1)) Nothing fa
+  foldl1 = foldl1
 
 instance unfoldable1NonEmpty :: Unfoldable f => Unfoldable1 (NonEmpty f) where
   unfoldr1 f b = uncurry (:|) $ unfoldr (map f) <$> f b
diff --git a/test/Main.purs b/test/Main.purs
index b0a7e9a..9e3fcac 100644
--- a/test/Main.purs
+++ b/test/Main.purs
@@ -5,7 +5,7 @@ import Prelude
 import Data.Foldable (fold, foldl)
 import Data.Maybe (Maybe(..))
 import Data.NonEmpty (NonEmpty, (:|), foldl1, oneOf, head, tail, singleton)
-import Data.Semigroup.Foldable (fold1)
+import Data.Semigroup.Foldable (fold1, foldr1)
 import Data.Unfoldable1 as U1
 import Effect (Effect)
 import Test.Assert (assert)
@@ -19,7 +19,8 @@ main :: Effect Unit
 main = do
   assert $ singleton 0 == 0 :| []
   assert $ 0 :| Nothing /= 0 :| Just 1
-  assert $ foldl1 (+) (1 :| [2, 3]) == 6
+  assert $ foldl1 (\l r -> "(" <> l <> r <> ")") ("a" :| ["b", "c", "d"]) == "(((ab)c)d)"
+  assert $ foldr1 (\l r -> "(" <> l <> r <> ")") ("a" :| ["b", "c", "d"]) == "(a(b(cd)))"
   assert $ foldl (+) 0 (1 :| [2, 3]) == 6
   assert $ fold1 ("Hello" :| [" ", "World"]) == "Hello World"
   assert $ fold ("Hello" :| [" ", "World"]) == "Hello World"