diff --git a/Changelog.md b/Changelog.md
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,3 +1,7 @@
+# 0.1.1 [2021-10-30]
+
+- Add `Solo` instances
+
 # 0.1 [2020-12-15]
 
 - Split out and combine this package functionality from `lens` and `optics`
diff --git a/bench/folds.hs b/bench/folds.hs
deleted file mode 100644
--- a/bench/folds.hs
+++ /dev/null
@@ -1,72 +0,0 @@
-{-# LANGUAGE CPP #-}
-{-# LANGUAGE DeriveFunctor    #-}
-{-# LANGUAGE FlexibleContexts #-}
-{-# LANGUAGE RankNTypes       #-}
-module Main (main) where
-
-import Criterion.Main (bench, bgroup, defaultMain, nf)
-
-import qualified Data.Foldable     as F
-import qualified Data.HashMap.Lazy as HM
-import qualified Data.Map          as Map
-import qualified Data.Sequence     as Seq
-import qualified Data.Vector       as V
-
-import Data.Foldable.WithIndex
-import Data.Functor.WithIndex.Instances ()
-
-main :: IO ()
-main = defaultMain
-  [ bgroup "vector"
-    [ bgroup "itoList"
-      [ bench "native"     $ nf (V.toList . V.indexed) v
-      , bench "itoList"    $ nf itoList v
-      ]
-    ]
-#if MIN_VERSION_containers(0,5,0)
-  , bgroup "sequence"
-    [ bgroup "itoList"
-      [ bench "native"     $ nf (F.toList . Seq.mapWithIndex (,)) s
-      , bench "itoList"    $ nf itoList s
-      ]
-    ]
-#endif
-  , bgroup "list"
-    [ bgroup "itoList"
-      [ bench "native"     $ nf (zip [(0::Int)..]) l
-      , bench "itoList"    $ nf itoList l
-      ]
-    ]
-  , bgroup "map"
-    [  bgroup "itoList"
-      [ bench "native"     $ nf Map.toList m
-      , bench "itoList"    $ nf itoList m
-      ]
-    ]
-  , bgroup "hashmap"
-    [ bgroup "itoList"
-      [ bench "native"     $ nf HM.toList h
-      , bench "itoList"    $ nf itoList h
-      ]
-    ]
-  ]
-
-l :: [Int]
-l = [0..10000]
-{-# NOINLINE l #-}
-
-h :: HM.HashMap Int Int
-h = HM.fromList $ zip l l
-{-# NOINLINE h #-}
-
-m :: Map.Map Int Int
-m = Map.fromList $ zip l l
-{-# NOINLINE m #-}
-
-s :: Seq.Seq Int
-s = Seq.fromList l
-{-# NOINLINE s #-}
-
-v :: V.Vector Int
-v = V.fromList l
-{-# NOINLINE v #-}
diff --git a/bench/traversals.hs b/bench/traversals.hs
deleted file mode 100644
--- a/bench/traversals.hs
+++ /dev/null
@@ -1,78 +0,0 @@
-{-# LANGUAGE CPP              #-}
-{-# LANGUAGE DeriveFunctor    #-}
-{-# LANGUAGE FlexibleContexts #-}
-{-# LANGUAGE RankNTypes       #-}
-{-# OPTIONS_GHC -fno-warn-orphans #-}
-module Main (main) where
-
-import Criterion.Main (bench, bgroup, defaultMain, nf)
-
-import qualified Data.HashMap.Lazy as HM
-import qualified Data.Map          as Map
-import qualified Data.Sequence     as Seq
-import qualified Data.Vector       as V
-
-import Data.Functor.WithIndex           (imap)
-import Data.Functor.WithIndex.Instances ()
-import Data.Traversable.WithIndex       (imapDefault)
-
-main :: IO ()
-main = defaultMain
-  [ bgroup "vector"
-    [ bgroup "imap"
-      [ bench "native"   $ nf (V.imap           (\i x -> x + i + 100)) v
-      , bench "imap"     $ nf (imap             (\i x -> x + i + 100)) v
-      , bench "default"  $ nf (imapDefault      (\i x -> x + i + 100)) v
-      ]
-    ]
-#if MIN_VERSION_containers(0,5,0)
-  , bgroup "sequence"
-    [  bgroup "imap"
-      [ bench "native"   $ nf (Seq.mapWithIndex (\i x -> x + i + 100)) s
-      , bench "imap"     $ nf (imap             (\i x -> x + i + 100)) s
-      , bench "default"  $ nf (imapDefault      (\i x -> x + i + 100)) s
-      ]
-    ]
-#endif
-  , bgroup "list"
-    [ bgroup "imap"
-      [ bench "native"   $ nf (zipWith          (\i x -> x + i + 100) [0..]) l
-      , bench "imap"     $ nf (imap             (\i x -> x + i + 100))       l
-      , bench "default"  $ nf (imapDefault      (\i x -> x + i + 100))       l
-      ]
-    ]
-  , bgroup "map"
-    [ bgroup "imap"
-      [ bench "native"   $ nf (Map.mapWithKey   (\i x -> x + i + 100)) m
-      , bench "imap"     $ nf (imap             (\i x -> x + i + 100)) m
-      , bench "default"  $ nf (imapDefault      (\i x -> x + i + 100)) m
-      ]
-    ]
-  , bgroup "hashmap"
-    [ bgroup "imap"
-      [ bench "native"   $ nf (HM.mapWithKey    (\i x -> x + i + 100)) h
-      , bench "imap"     $ nf (imap             (\i x -> x + i + 100)) h
-      , bench "default"  $ nf (imapDefault      (\i x -> x + i + 100)) h
-      ]
-    ]
-  ]
-
-l :: [Int]
-l = [0..10000]
-{-# NOINLINE l #-}
-
-h :: HM.HashMap Int Int
-h = HM.fromList $ zip l l
-{-# NOINLINE h #-}
-
-m :: Map.Map Int Int
-m = Map.fromList $ zip l l
-{-# NOINLINE m #-}
-
-s :: Seq.Seq Int
-s = Seq.fromList l
-{-# NOINLINE s #-}
-
-v :: V.Vector Int
-v = V.fromList l
-{-# NOINLINE v #-}
diff --git a/indexed-traversable-instances.cabal b/indexed-traversable-instances.cabal
--- a/indexed-traversable-instances.cabal
+++ b/indexed-traversable-instances.cabal
@@ -1,6 +1,6 @@
 cabal-version:      1.12
 name:               indexed-traversable-instances
-version:            0.1.1
+version:            0.1.1.1
 build-type:         Simple
 license:            BSD2
 license-file:       LICENSE
@@ -31,8 +31,9 @@
    || ==8.6.5
    || ==8.8.4
    || ==8.10.7
-   || ==9.0.1
-   || ==9.2.1
+   || ==9.0.2
+   || ==9.2.4
+   || ==9.4.1
 
 source-repository head
   type:     git
@@ -44,12 +45,12 @@
   ghc-options:      -Wall
   hs-source-dirs:   src
   build-depends:
-      base                  >=4.5      && <4.17
+      base                  >=4.5      && <4.18
     , indexed-traversable   >=0.1      && <0.2
     , OneTuple              >=0.3      && <0.4
     , tagged                >=0.8.6    && <0.9
     , unordered-containers  >=0.2.8.0  && <0.3
-    , vector                >=0.12.1.2 && <0.13
+    , vector                >=0.12.1.2 && <0.14
 
   exposed-modules:  Data.Functor.WithIndex.Instances
 
@@ -85,35 +86,3 @@
     , quickcheck-instances  >=0.3.26   && <0.4
     , tasty                 >=1.2.3    && <1.5
     , tasty-quickcheck      >=0.10.1.1 && <0.11
-
-benchmark folds
-  type:             exitcode-stdio-1.0
-  main-is:          folds.hs
-  default-language: Haskell2010
-  hs-source-dirs:   bench
-  ghc-options:      -Wall
-  build-depends:
-      base
-    , containers
-    , indexed-traversable
-    , indexed-traversable-instances
-    , unordered-containers
-    , vector
-
-  build-depends:    criterion >=1.5.9.0 && <1.6
-
-benchmark traversals
-  type:             exitcode-stdio-1.0
-  main-is:          traversals.hs
-  default-language: Haskell2010
-  hs-source-dirs:   bench
-  ghc-options:      -Wall
-  build-depends:
-      base
-    , containers
-    , indexed-traversable
-    , indexed-traversable-instances
-    , unordered-containers
-    , vector
-
-  build-depends:    criterion >=1.5.9.0 && <1.6
