diff --git a/ChangeLog.md b/ChangeLog.md
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--- /dev/null
+++ b/ChangeLog.md
@@ -0,0 +1,3 @@
+# Changelog for ixset-binary-instance
+
+## Unreleased changes
diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,19 @@
+Copyright (c) 2020 Daniel Firth
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
diff --git a/README.md b/README.md
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--- /dev/null
+++ b/README.md
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+# ixset-binary-instance
diff --git a/ixset-typed-binary-instance.cabal b/ixset-typed-binary-instance.cabal
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--- /dev/null
+++ b/ixset-typed-binary-instance.cabal
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+cabal-version: 1.12
+
+-- This file has been generated from package.yaml by hpack version 0.34.2.
+--
+-- see: https://github.com/sol/hpack
+
+name:           ixset-typed-binary-instance
+version:        0.1.0.0
+synopsis:       Binary instance for ixset-typed.
+description:    Please see the README on GitHub at <https://gitlab.com/homotopic-tech/ixset-typed-binary-instance/README.md>
+category:       Data Structures
+author:         Daniel Firth
+maintainer:     dan,firth@homotopic.tech
+copyright:      2020 Daniel Firth
+license:        MIT
+license-file:   LICENSE
+build-type:     Simple
+extra-source-files:
+    README.md
+    ChangeLog.md
+
+source-repository head
+  type: git
+  location: https://gitlab.com/homotopic-tech/ixset-typed-binary-instance
+
+library
+  exposed-modules:
+      Data.IxSet.Typed.Binary
+  other-modules:
+      Paths_ixset_typed_binary_instance
+  hs-source-dirs:
+      src
+  build-depends:
+      base >=4.7 && <5
+    , binary
+    , ixset-typed
+  default-language: Haskell2010
diff --git a/src/Data/IxSet/Typed/Binary.hs b/src/Data/IxSet/Typed/Binary.hs
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+++ b/src/Data/IxSet/Typed/Binary.hs
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+module Data.IxSet.Typed.Binary where
+
+import Data.Binary
+import Data.IxSet.Typed
+
+instance (Indexable ixs x, Binary x) => Binary (IxSet ixs x) where
+  put = put . toList
+  get = fmap fromList get
+