diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,10 +1,14 @@
 # Revsion history of io-classes
 
-## next
+## 1.11.0.0
 
 ### Breaking changes
 
+- Removed the deprecated `withLiftST` (deprecated since `io-classes-1.5.0.0`).
+
 ### Non-breaking changes
+
+* Repository moved to https://github.com/IntersectMBO/io-sim
 
 ## 1.10.1.0
 
diff --git a/NOTICE b/NOTICE
--- a/NOTICE
+++ b/NOTICE
@@ -1,4 +1,4 @@
-Copyright 2019-2024 Input Output Global Inc (IOG)
+Copyright 2019-2026 Input Output Global Inc (IOG), 2026 Intersect
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -12,19 +12,19 @@
 
 We provide also non-standard extensions of this API in **sublibraries**:
 
-* [`io-classes:strict-stm`](https://input-output-hk.github.io/io-sim/io-classes/strict-stm/index.html) strict `TVar`'s, and other mutable `STM` variables, with
+* [`io-classes:strict-stm`](https://intersectmbo.github.io/io-sim/io-classes/strict-stm/index.html) strict `TVar`'s, and other mutable `STM` variables, with
   support of the [`nothunks`] library;
-* [`io-classes:strict-mvar`](https://input-output-hk.github.io/io-sim/io-classes/strict-mvar/index.html): strict `MVar`s
-* [`io-classes:si-timers`](https://input-output-hk.github.io/io-sim/io-classes/si-timers/index.html): timers api:
+* [`io-classes:strict-mvar`](https://intersectmbo.github.io/io-sim/io-classes/strict-mvar/index.html): strict `MVar`s
+* [`io-classes:si-timers`](https://intersectmbo.github.io/io-sim/io-classes/si-timers/index.html): timers api:
 
     - 32-bit safe API using `DiffTime` measured in seconds (rather than time in
       microseconds represented as `Int` as in `base`)
     - cancellable timeouts.
 
-* [`io-classes:mtl`](https://input-output-hk.github.io/io-sim/io-classes/mtl/index.html):
+* [`io-classes:mtl`](https://intersectmbo.github.io/io-sim/io-classes/mtl/index.html):
   MTL instances.
 
-[`io-classes:strict-stm`](https://input-output-hk.github.io/io-sim/io-classes/strict-stm/index.html)
+[`io-classes:strict-stm`](https://intersectmbo.github.io/io-sim/io-classes/strict-stm/index.html)
 and [`nothunks`] were successfully used in a large
 code base to eliminate space leaks and keep that property over long development
 cycles.
@@ -80,7 +80,7 @@
 ## Software Transactional Memory API
 
 We provide two interfaces to `stm` API: lazy, included in [`io-classes`][lazy-stm]; and
-strict one provided by [`io-classes:strict-stm`](https://input-output-hk.github.io/io-sim/io-classes/strict-stm/index.html).
+strict one provided by [`io-classes:strict-stm`](https://intersectmbo.github.io/io-sim/io-classes/strict-stm/index.html).
 
 ## Threads API
 
@@ -164,27 +164,27 @@
 [`base`]: https://hackage.haskell.org/package/base
 [`exceptions`]: https://hackage.haskell.org/package/exceptions
 [`io-sim`]: https://hackage.haskell.org/package/io-sim
-[io-classes:strict-mvar]: https://input-output-hk.github.io/io-sim/io-classes/strict-mvar/index.html
-[io-classes:mtl]: https://input-output-hk.github.io/io-sim/io-classes/mtl/index.html
+[io-classes:strict-mvar]: https://intersectmbo.github.io/io-sim/io-classes/strict-mvar/index.html
+[io-classes:mtl]: https://intersectmbo.github.io/io-sim/io-classes/mtl/index.html
 [`stm`]: https://hackage.haskell.org/package/stm
-[lazy-stm]: https://input-output-hk.github.io/io-sim/io-classes/Control-Concurrent-Class-MonadSTM.html
+[lazy-stm]: https://intersectmbo.github.io/io-sim/io-classes/Control-Concurrent-Class-MonadSTM.html
 [`threadDelay`]: https://hackage.haskell.org/package/io-classes/docs/Control-Monad-Class-MonadTimer.html#v:threadDelay
 [`time`]: https://hackage.haskell.org/package/time
-[contributing]: https://www.github.com/input-output-hk/io-sim/tree/master/CONTRIBUTING.md
+[contributing]: https://www.github.com/intersectmbo/io-sim/tree/master/CONTRIBUTING.md
 [`nothunks`]: https://hackage.haskell.org/package/nothunks
 [labelThread-base]: https://hackage.haskell.org/package/base-4.17.0.0/docs/GHC-Conc-Sync.html#v:labelThread
 [io-deadlock]: https://hackage.haskell.org/package/base-4.19.0.0/docs/Control-Exception.html#t:Deadlock
 
-[MonadEventlog]: https://input-output-hk.github.io/io-sim/io-classes/Control-Monad-Class-MonadEventlog.html#t:MonadEventlog
+[MonadEventlog]: https://intersectmbo.github.io/io-sim/io-classes/Control-Monad-Class-MonadEventlog.html#t:MonadEventlog
 [Debug.Trace]: https://hackage.haskell.org/package/base/docs/Debug-Trace.html
-[MonadAsync]: https://input-output-hk.github.io/io-sim/io-classes/Control-Monad-Class-MonadAsync.html#t:MonadAsync
-[MonadFork]: https://input-output-hk.github.io/io-sim/io-classes/Control-Monad-Class-MonadFork.html#t:MonadFork
-[MonadMVar]: https://input-output-hk.github.io/io-sim/io-classes/Control-Concurrent-Class-MonadMVar.html#t:MonadMVar
-[`registerDelayCancellable`]: http://input-output-hk.github.io/io-sim/io-classes/si-timers/Control-Monad-Class-MonadTimer-SI.html#v:registerDelayCancellable
-[strict-mvar]: https://input-output-hk.github.io/io-sim/io-classes/strict-mvar/Control-Concurrent-Class-MonadMVar-Strict.html
-[MonadST]: https://input-output-hk.github.io/io-sim/io-classes/Control-Monad-Class-MonadST.html#t:MonadST
-[MonadSay]: https://input-output-hk.github.io/io-sim/io-classes/Control-Monad-Class-MonadSay.html#t:MonadSay
-[io-classes-haddocks]: https://input-output-hk.github.io/io-sim
+[MonadAsync]: https://intersectmbo.github.io/io-sim/io-classes/Control-Monad-Class-MonadAsync.html#t:MonadAsync
+[MonadFork]: https://intersectmbo.github.io/io-sim/io-classes/Control-Monad-Class-MonadFork.html#t:MonadFork
+[MonadMVar]: https://intersectmbo.github.io/io-sim/io-classes/Control-Concurrent-Class-MonadMVar.html#t:MonadMVar
+[`registerDelayCancellable`]: http://intersectmbo.github.io/io-sim/io-classes/si-timers/Control-Monad-Class-MonadTimer-SI.html#v:registerDelayCancellable
+[strict-mvar]: https://intersectmbo.github.io/io-sim/io-classes/strict-mvar/Control-Concurrent-Class-MonadMVar-Strict.html
+[MonadST]: https://intersectmbo.github.io/io-sim/io-classes/Control-Monad-Class-MonadST.html#t:MonadST
+[MonadSay]: https://intersectmbo.github.io/io-sim/io-classes/Control-Monad-Class-MonadSay.html#t:MonadSay
+[io-classes-haddocks]: https://intersectmbo.github.io/io-sim
 
 [bob-conf]: https://youtu.be/uedUGeWN4ZM
 [zuriHac-2022]: https://youtu.be/tKIYQgJnGkA
diff --git a/io-classes.cabal b/io-classes.cabal
--- a/io-classes.cabal
+++ b/io-classes.cabal
@@ -1,6 +1,6 @@
 cabal-version:       3.4
 name:                io-classes
-version:             1.10.1.0
+version:             1.11.0.0
 synopsis:            Type classes for concurrency with STM, ST and timing
 description:
   IO Monad class hierarchy compatible with:
@@ -27,22 +27,22 @@
 
   = Documentation
   Haddocks of all public sublibraries are published
-  [here](https://input-output-hk.github.io/io-sim).
+  [here](https://intersectmbo.github.io/io-sim).
 
 license:             Apache-2.0
 license-files:       LICENSE NOTICE
-copyright:           2019-2025 Input Output Global Inc (IOG)
+copyright:           2019-2026 Input Output Global Inc (IOG), 2026 Intersect
 author:              Alexander Vieth, Duncan Coutts, Marcin Szamotulski, Neil Davies, Thomas Winant
 maintainer:          Duncan Coutts duncan@well-typed.com, Marcin Szamotulski coot@coot.me
 category:            Control
 build-type:          Simple
 extra-doc-files:     CHANGELOG.md README.md strict-stm/README.md strict-mvar/README.md
-bug-reports:         https://github.com/input-output-hk/io-sim/issues
+bug-reports:         https://github.com/intersectmbo/io-sim/issues
 tested-with:         GHC == { 9.6, 9.8, 9.10, 9.12, 9.14 }
 
 source-repository head
   type:     git
-  location: https://github.com/input-output-hk/io-sim
+  location: https://github.com/intersectmbo/io-sim
   subdir:   io-classes
 
 flag asserts
diff --git a/io-classes/Control/Monad/Class/MonadEventlog.hs b/io-classes/Control/Monad/Class/MonadEventlog.hs
--- a/io-classes/Control/Monad/Class/MonadEventlog.hs
+++ b/io-classes/Control/Monad/Class/MonadEventlog.hs
@@ -1,4 +1,9 @@
-module Control.Monad.Class.MonadEventlog (MonadEventlog (..)) where
+module Control.Monad.Class.MonadEventlog
+  ( MonadEventlog (..)
+    -- Re-exports
+  , IO.traceEvent
+  , IO.traceMarker
+  ) where
 
 import Control.Monad.Reader
 
diff --git a/io-classes/Control/Monad/Class/MonadST.hs b/io-classes/Control/Monad/Class/MonadST.hs
--- a/io-classes/Control/Monad/Class/MonadST.hs
+++ b/io-classes/Control/Monad/Class/MonadST.hs
@@ -37,21 +37,12 @@
   -- | @since 1.4.1.0
   stToIO :: ST (PrimState m) a -> m a
 
-  -- | Deprecated. Use 'stToIO' instead.
-  withLiftST :: (forall s. (forall a. ST s a -> m a) -> b) -> b
-  withLiftST = \k -> k stToIO
-
-{-# DEPRECATED withLiftST "Use the simpler 'stToIO' instead." #-}
-
 instance MonadST IO where
   stToIO = stToPrim
 
 instance MonadST (ST s) where
   stToIO = stToPrim
-  withLiftST = \f -> f id
 
 instance (MonadST m, PrimMonad m) => MonadST (ReaderT r m) where
   stToIO :: ST (PrimState m) a -> ReaderT r m a
   stToIO f = lift (stToPrim f)
-
-  withLiftST f = withLiftST $ \g -> f (lift . g)
diff --git a/mtl/Control/Monad/Class/MonadST/Trans.hs b/mtl/Control/Monad/Class/MonadST/Trans.hs
--- a/mtl/Control/Monad/Class/MonadST/Trans.hs
+++ b/mtl/Control/Monad/Class/MonadST/Trans.hs
@@ -17,32 +17,24 @@
 
 instance MonadST m => MonadST (ContT r m) where
   stToIO = lift . stToIO
-  withLiftST f = withLiftST $ \g -> f (lift . g)
 
 instance MonadST m => MonadST (ExceptT e m) where
   stToIO = lift . stToIO
-  withLiftST f = withLiftST $ \g -> f (lift . g)
 
 instance (Monoid w, MonadST m) => MonadST (Lazy.RWST r w s m) where
   stToIO = lift . stToIO
-  withLiftST f = withLiftST $ \g -> f (lift . g)
 
 instance (Monoid w, MonadST m) => MonadST (Strict.RWST r w s m) where
   stToIO = lift . stToIO
-  withLiftST f = withLiftST $ \g -> f (lift . g)
 
 instance MonadST m => MonadST (Lazy.StateT s m) where
   stToIO = lift . stToIO
-  withLiftST f = withLiftST $ \g -> f (lift . g)
 
 instance MonadST m => MonadST (Strict.StateT s m) where
   stToIO = lift . stToIO
-  withLiftST f = withLiftST $ \g -> f (lift . g)
 
 instance (Monoid w, MonadST m) => MonadST (Lazy.WriterT w m) where
   stToIO = lift . stToIO
-  withLiftST f = withLiftST $ \g -> f (lift . g)
 
 instance (Monoid w, MonadST m) => MonadST (Strict.WriterT w m) where
   stToIO = lift . stToIO
-  withLiftST f = withLiftST $ \g -> f (lift . g)
diff --git a/strict-mvar/README.md b/strict-mvar/README.md
--- a/strict-mvar/README.md
+++ b/strict-mvar/README.md
@@ -4,4 +4,4 @@
 variables (`MVar`). It builds on top of `io-classes:io-classes`, and thus it
 provides the interface for `MVar`s implementations from both
 [base](https://hackage.haskell.org/package/base-4.17.0.0/docs/Control-Concurrent-MVar.html)
-and [io-sim](https://github.com/input-output-hk/io-sim).
+and [io-sim](https://github.com/intersectmbo/io-sim).
diff --git a/strict-stm/README.md b/strict-stm/README.md
--- a/strict-stm/README.md
+++ b/strict-stm/README.md
@@ -11,7 +11,7 @@
 [`nothunks`] library it was successfully used to eliminate and keep a large
 system ([`cardano-node`]) space leak free.
 
-[`cardano-node`]: https://www.github.com/input-output-hk/cardano-node
+[`cardano-node`]: https://www.github.com/intersectmbo/cardano-node
 [`io-classes:io-classes`]: https://hackage.haskell.org/package/io-classes
 [`io-sim`]: https://hackage.haskell.org/package/io-sim
 [`nothunks`]: https://hackage.haskell.org/package/nothunks