diff --git a/CHANGES.md b/CHANGES.md
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,3 +1,13 @@
+0.3.1.1 (13 Feb 2023)
+----------------------
+
+  - Allow `mtl-2.3` (thanks to @FinleyMcIlwaine)
+
+0.3.1-r1 (23 August 2022)
+---------------------
+
+  - Allow `base-4.17` and test on GHC 9.4
+
 0.3.1 (24 March 2022)
 ---------------------
 
diff --git a/Control/Monad/StateStack.hs b/Control/Monad/StateStack.hs
--- a/Control/Monad/StateStack.hs
+++ b/Control/Monad/StateStack.hs
@@ -59,6 +59,7 @@
 import           Control.Arrow                     (first, (&&&))
 import qualified Control.Monad.State               as St
 
+import           Control.Monad
 import           Control.Monad.Identity
 import           Control.Monad.Trans
 import           Control.Monad.Trans.Cont
diff --git a/statestack.cabal b/statestack.cabal
--- a/statestack.cabal
+++ b/statestack.cabal
@@ -1,5 +1,5 @@
 Name:                statestack
-Version:             0.3.1
+Version:             0.3.1.1
 Synopsis:            Simple State-like monad transformer with saveable and restorable state
 Description:         Simple State-like monad transformer where states can be saved to
                      and restored from an internal stack.
@@ -12,7 +12,7 @@
 Build-type:          Simple
 Cabal-version:       >=1.10
 Bug-reports:         http://github.com/diagrams/statestack/issues
-Tested-with:         GHC ==7.10.3 || ==8.0.2 || ==8.2.2 || ==8.4.4 || ==8.6.5 || ==8.8.4 || ==8.10.4 || ==9.0.1 || ==9.2.1
+Tested-with:         GHC ==7.10.3 || ==8.0.2 || ==8.2.2 || ==8.4.4 || ==8.6.5 || ==8.8.4 || ==8.10.7 || ==9.0.2 || ==9.2.6 || ==9.4.4
 Source-repository head
   type: git
   location: git://github.com/diagrams/statestack
@@ -20,6 +20,6 @@
 Library
   Default-language:    Haskell2010
   Exposed-modules:     Control.Monad.StateStack
-  Build-depends:       base >= 4.8 && < 4.17,
-                       mtl >= 2.1 && < 2.3,
+  Build-depends:       base >= 4.8 && < 4.18,
+                       mtl >= 2.1 && < 2.4,
                        transformers >= 0.4 && < 0.7