diff --git a/CHANGELOG.markdown b/CHANGELOG.markdown
--- a/CHANGELOG.markdown
+++ b/CHANGELOG.markdown
@@ -1,3 +1,8 @@
+1.0.5
+-----
+* Widened version bound on `bifunctors`.
+* Widened version bound on `profunctors`.
+
 1.0.4
 -----
 * Widened version bound on `transformers`.
diff --git a/bound.cabal b/bound.cabal
--- a/bound.cabal
+++ b/bound.cabal
@@ -1,6 +1,6 @@
 name:          bound
 category:      Language, Compilers/Interpreters
-version:       1.0.4
+version:       1.0.5
 license:       BSD3
 cabal-version: >= 1.9.2
 license-file:  LICENSE
@@ -66,7 +66,7 @@
 
   build-depends:
     base            >= 4       && < 5,
-    bifunctors      >= 3       && < 5,
+    bifunctors      >= 3       && < 6,
     binary          >= 0.5     && < 0.8,
     bytes           >= 0.4     && < 1,
     cereal          >= 0.3.5.2 && < 0.5,
@@ -74,7 +74,7 @@
     hashable        >= 1.1     && < 1.3,
     hashable-extras >= 0.1     && < 1,
     prelude-extras  >= 0.3     && < 1,
-    profunctors     >= 3.3     && < 5,
+    profunctors     >= 3.3     && < 6,
     transformers    >= 0.2     && < 0.5
 
   ghc-options: -Wall -O2 -fspec-constr -fdicts-cheap -funbox-strict-fields