diff --git a/dynamic-state.cabal b/dynamic-state.cabal
--- a/dynamic-state.cabal
+++ b/dynamic-state.cabal
@@ -1,5 +1,5 @@
 name:                dynamic-state
-version:             0.1.0.0
+version:             0.1.0.1
 synopsis:            Optionally serializable dynamic state keyed by type
 description:         Optionally serializable dynamic state keyed by type
 license:             BSD3
@@ -11,12 +11,11 @@
 cabal-version:       >=1.10
 
 library
-  ghc-options:      -Wall 
+  ghc-options:      -Wall
 
   exposed-modules:
     Data.DynamicState
     Data.DynamicState.Serializable
-    Data.HashMap.Instances
 
   build-depends:
       base >=4.5 && <5
diff --git a/src/Data/DynamicState/Serializable.hs b/src/Data/DynamicState/Serializable.hs
--- a/src/Data/DynamicState/Serializable.hs
+++ b/src/Data/DynamicState/Serializable.hs
@@ -25,7 +25,6 @@
   ) where
 
 import Data.Binary
-import Data.HashMap.Instances()
 import Data.HashMap.Strict as M
 import Data.ConcreteTypeRep
 import Data.Typeable
@@ -74,8 +73,8 @@
     put' $ DynamicState (M.insert (cTypeOf (undefined :: a)) (Dynamic v) dvs)
 
 instance Binary DynamicState where
-  put (DynamicState ds) = put ds
-  get = DynamicState <$> get
+  put (DynamicState ds) = put (M.toList ds)
+  get = DynamicState . M.fromList <$> get
 
 -- TODO: since a 'DynamicState' is now serialisable, it could potentially
 -- exist for a long time (days/months?). No operations are provided to remove
diff --git a/src/Data/HashMap/Instances.hs b/src/Data/HashMap/Instances.hs
deleted file mode 100644
--- a/src/Data/HashMap/Instances.hs
+++ /dev/null
@@ -1,22 +0,0 @@
-{-# OPTIONS_GHC -fno-warn-orphans #-}
-{-# OPTIONS_HADDOCK show-extensions #-}
-
--- |
--- Module      :  Data.HashMap.Instances
--- License     :  BSD3
--- Maintainer  :  zcarterc@gmail.com
--- Stability   :  experimental
--- Portability :  portable
---
--- Orphan Binary instance for HashMap
-
-module Data.HashMap.Instances where
-
-import Control.Applicative
-import Data.HashMap.Strict as HashMap
-import Data.Hashable
-import Data.Binary
-
-instance (Eq k, Hashable k, Binary k, Binary v) => Binary (HashMap.HashMap k v) where
-  put x = put (HashMap.toList x)
-  get = HashMap.fromList <$> get