diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Changelog
 
+## [0.1.0.3] - 2023-01-18
+
+### Changed
+
+* Compatibility with `mtl-2.3.1`
+
 ## [0.1.0.2] - 2022-07-21
 
 ### Added
diff --git a/autodocodec-schema.cabal b/autodocodec-schema.cabal
--- a/autodocodec-schema.cabal
+++ b/autodocodec-schema.cabal
@@ -5,7 +5,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           autodocodec-schema
-version:        0.1.0.2
+version:        0.1.0.3
 synopsis:       Autodocodec interpreters for JSON Schema
 homepage:       https://github.com/NorfairKing/autodocodec#readme
 bug-reports:    https://github.com/NorfairKing/autodocodec/issues
diff --git a/src/Autodocodec/Schema.hs b/src/Autodocodec/Schema.hs
--- a/src/Autodocodec/Schema.hs
+++ b/src/Autodocodec/Schema.hs
@@ -11,6 +11,7 @@
 
 import Autodocodec
 import qualified Autodocodec.Aeson.Compat as Compat
+import Control.Monad
 import Control.Monad.State
 import Data.Aeson (FromJSON (..), ToJSON (..))
 import qualified Data.Aeson as JSON