diff --git a/safecopy.cabal b/safecopy.cabal
--- a/safecopy.cabal
+++ b/safecopy.cabal
@@ -7,7 +7,7 @@
 -- The package version. See the Haskell package versioning policy
 -- (http://www.haskell.org/haskellwiki/Package_versioning_policy) for
 -- standards guiding when and how versions should be incremented.
-Version:             0.4.2
+Version:             0.4.3
 
 -- A short (one-line) description of the package.
 Synopsis:            Binary serialization with version control.
diff --git a/src/Data/SafeCopy/Instances.hs b/src/Data/SafeCopy/Instances.hs
--- a/src/Data/SafeCopy/Instances.hs
+++ b/src/Data/SafeCopy/Instances.hs
@@ -39,16 +39,16 @@
     putCopy Nothing = contain $ put False
 
 instance (SafeCopy a, Ord a) => SafeCopy (Set.Set a) where
-    getCopy = contain $ fmap Set.fromList safeGet
-    putCopy = contain . safePut . Set.toList
+    getCopy = contain $ fmap Set.fromAscList safeGet
+    putCopy = contain . safePut . Set.toAscList
 
 instance (SafeCopy a,SafeCopy b, Ord a) => SafeCopy (Map.Map a b) where
-    getCopy = contain $ fmap Map.fromList safeGet
-    putCopy = contain . safePut . Map.toList
+    getCopy = contain $ fmap Map.fromAscList safeGet
+    putCopy = contain . safePut . Map.toAscList
 
 instance (SafeCopy a) => SafeCopy (IntMap.IntMap a) where
-    getCopy = contain $ fmap IntMap.fromList safeGet
-    putCopy = contain . safePut . IntMap.toList
+    getCopy = contain $ fmap IntMap.fromAscList safeGet
+    putCopy = contain . safePut . IntMap.toAscList
 
 
 instance (SafeCopy a, SafeCopy b) => SafeCopy (a,b) where
diff --git a/src/Data/SafeCopy/SafeCopy.hs b/src/Data/SafeCopy/SafeCopy.hs
--- a/src/Data/SafeCopy/SafeCopy.hs
+++ b/src/Data/SafeCopy/SafeCopy.hs
@@ -57,7 +57,7 @@
 --   together with how it should be serialized/parsed.
 --
 --   Users should define instances of 'SafeCopy' for their types
---   even through 'getCopy' and 'putCopy' can't be used directly.
+--   even though 'getCopy' and 'putCopy' can't be used directly.
 --   To serialize/parse a data type using 'SafeCopy', see 'safeGet'
 --   and 'safePut'.
 class SafeCopy a where