diff --git a/CHANGES.md b/CHANGES.md
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,8 @@
+0.3.4.1 (2019-02-20)
+====================
+
+-   Bounds bumps
+
 0.3.4.0 (2018-11-11)
 ====================
 
diff --git a/pinch.cabal b/pinch.cabal
--- a/pinch.cabal
+++ b/pinch.cabal
@@ -2,10 +2,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 58647b3d18496665a01f919c63779068ca00ad1c2ea6eaddba33eedf9fc712d2
+-- hash: a26aa0d54b7b1bd93ac84d5f821dcc0245b6df6ff10cb67dda63ee3f7f879551
 
 name:           pinch
-version:        0.3.4.0
+version:        0.3.4.1
 cabal-version:  >= 1.10
 build-type:     Simple
 license:        BSD3
@@ -52,7 +52,7 @@
         array >=0.5,
         base >=4.7 && <5,
         bytestring >=0.10 && <0.11,
-        containers >=0.5 && <0.6,
+        containers >=0.5 && <0.7,
         deepseq >=1.3 && <1.5,
         ghc-prim,
         hashable >=1.2 && <1.3,
@@ -60,6 +60,8 @@
         text >=1.2 && <1.3,
         unordered-containers >=0.2 && <0.3,
         vector >=0.10 && <0.13
+    build-tools:
+        hspec-discover >=2.1
     exposed-modules:
         Pinch
         Pinch.Internal.Builder
@@ -89,14 +91,15 @@
         QuickCheck >=2.5,
         base >=4.7 && <5,
         bytestring >=0.10 && <0.11,
-        containers >=0.5 && <0.6,
+        containers >=0.5 && <0.7,
         hspec >=2.0,
-        hspec-discover >=2.1,
         pinch,
         semigroups >=0.18 && <0.19,
         text >=1.2 && <1.3,
         unordered-containers >=0.2 && <0.3,
         vector >=0.10 && <0.13
+    build-tools:
+        hspec-discover >=2.1
     other-modules:
         Pinch.Arbitrary
         Pinch.Expectations