diff --git a/CHANGELOG.markdown b/CHANGELOG.markdown
--- a/CHANGELOG.markdown
+++ b/CHANGELOG.markdown
@@ -1,3 +1,7 @@
+0.2.1
+-----
+* Claim to be Trustworthy
+
 0.2
 ---
 * Crippled to work with `bytes` 0.7, so we can work with `binary >= 0.6`.
diff --git a/bits.cabal b/bits.cabal
--- a/bits.cabal
+++ b/bits.cabal
@@ -1,6 +1,6 @@
 name:          bits
 category:      Data, Serialization
-version:       0.2
+version:       0.2.1
 license:       BSD3
 cabal-version: >= 1.8
 license-file:  LICENSE
diff --git a/src/Data/Bits/Extras.hs b/src/Data/Bits/Extras.hs
--- a/src/Data/Bits/Extras.hs
+++ b/src/Data/Bits/Extras.hs
@@ -1,4 +1,7 @@
 {-# LANGUAGE CPP, ForeignFunctionInterface, MagicHash, UnboxedTuples, BangPatterns #-}
+#if defined(__GLASGOW_HASKELL__) && __GLASGOW_HASKELL__ >= 702
+{-# LANGUAGE Trustworthy #-}
+#endif
 --------------------------------------------------------------------
 -- |
 -- Copyright :  (c) Edward Kmett 2013