diff --git a/CHANGELOG.markdown b/CHANGELOG.markdown
--- a/CHANGELOG.markdown
+++ b/CHANGELOG.markdown
@@ -1,3 +1,7 @@
+0.2
+---
+* Converted to `bifunctors` 4
+
 0.1.1
 -----
 * Marked this package `Trustworthy`
diff --git a/LICENSE b/LICENSE
--- a/LICENSE
+++ b/LICENSE
@@ -13,10 +13,6 @@
    notice, this list of conditions and the following disclaimer in the
    documentation and/or other materials provided with the distribution.
 
-3. Neither the name of the author nor the names of his contributors
-   may be used to endorse or promote products derived from this software
-   without specific prior written permission.
-
 THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
diff --git a/hashable-extras.cabal b/hashable-extras.cabal
--- a/hashable-extras.cabal
+++ b/hashable-extras.cabal
@@ -1,6 +1,6 @@
 name:          hashable-extras
 category:      Data, Hash
-version:       0.1.3
+version:       0.2
 license:       BSD3
 cabal-version: >= 1.8
 license-file:  LICENSE
@@ -47,7 +47,7 @@
 
   build-depends:
     base             >= 4.3      && < 5,
-    bifunctors       >= 3.2      && < 4,
+    bifunctors       >= 4        && < 5,
     bytestring       >= 0.9      && < 0.11,
     generic-deriving >= 1.4      && < 1.7,
     hashable         >= 1.1.2.3  && < 1.3,