diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+1.1.0.3
+-------
+* Removed a couple of redundant typeclass constraints.
+
 1.1.0.2
 -------
 * Relaxed upper version bound for `transformers`.
diff --git a/StateVar.cabal b/StateVar.cabal
--- a/StateVar.cabal
+++ b/StateVar.cabal
@@ -1,5 +1,5 @@
 name: StateVar
-version: 1.1.0.2
+version: 1.1.0.3
 synopsis: State variables
 description:
   This package contains state variables, which are references in the IO monad,
diff --git a/src/Data/StateVar.hs b/src/Data/StateVar.hs
--- a/src/Data/StateVar.hs
+++ b/src/Data/StateVar.hs
@@ -197,13 +197,13 @@
   -- | Transform the contents of a state variable with a given funtion.
   ($~) :: MonadIO m => t -> (a -> b) -> m ()
 #if USE_DEFAULT_SIGNATURES
-  default ($~) :: (MonadIO m, a ~ b, HasGetter t a, HasSetter t a) => t -> (a -> b) -> m ()
+  default ($~) :: (MonadIO m, a ~ b, HasGetter t a) => t -> (a -> b) -> m ()
   ($~) = defaultUpdate
 #endif
   -- | This is a variant of '$~' which is strict in the transformed value.
   ($~!) :: MonadIO m => t -> (a -> b) -> m ()
 #if USE_DEFAULT_SIGNATURES
-  default ($~!) :: (MonadIO m, a ~ b, HasGetter t a, HasSetter t a) => t -> (a -> b) -> m ()
+  default ($~!) :: (MonadIO m, a ~ b, HasGetter t a) => t -> (a -> b) -> m ()
   ($~!) = defaultUpdateStrict
 #endif