diff --git a/CHANGELOG.markdown b/CHANGELOG.markdown
--- a/CHANGELOG.markdown
+++ b/CHANGELOG.markdown
@@ -1,3 +1,7 @@
+0.2.1
+-----
+* Exported `insert` from `Data.HyperLogLog`.
+
 0.2
 ---
 * Made compatible with `lens` 4
diff --git a/hyperloglog.cabal b/hyperloglog.cabal
--- a/hyperloglog.cabal
+++ b/hyperloglog.cabal
@@ -1,6 +1,6 @@
 name:          hyperloglog
 category:      Numeric
-version:       0.2
+version:       0.2.1
 license:       BSD3
 cabal-version: >= 1.8
 license-file:  LICENSE
diff --git a/src/Data/HyperLogLog.hs b/src/Data/HyperLogLog.hs
--- a/src/Data/HyperLogLog.hs
+++ b/src/Data/HyperLogLog.hs
@@ -16,6 +16,7 @@
   , HasHyperLogLog(..)
   , size
   , intersectionSize
+  , insert
   , cast
   -- * Config
   , Config