diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,14 +1,22 @@
-## 0.0.x
+## 0.0.20220509
 
-TBA
+* Use explicit imports for mtl, avoiding mtl-2.3 incompatibility.
 
 ## New in lucid2
 
+lucid2 is a new package published to Hackage and maintained under `lucid2/` in this repository alongside `lucid1`. Releases are made under the [Immutable Publishing Policy](https://chrisdone.com/posts/ipp/), and users had asked for many breaking changes, therefore we needed a completely new namespace to work under, hence, "lucid2". Many things have also been dropped in the process, to simplify the codebase.
+
+This upgrade is **entirely optional**.
+
+People using `lucid` **will not have to do anything**. They can continue using that package indefinitely, it will be maintained alongside `lucid2`, to keep it building with GHCs and things. You can even use both packages in the same codebase with `-XPackageImports`.
+
 Changed:
 
-* All on* attributes and style_ do not escape their values anymore. Be
+* All `on*` attributes and `style_` do not escape their values anymore. Be
   careful. Though you were probably being careful with these anyway,
   as they are inherently dangerous for XXS.
+* The `Attribute` type has been replaced by `Attributes`, which is a `Monoid` instance. This makes it really easy to write code like `if X then class_ "foo" else mempty`.
+* The `class_` and `style_` attributes combine with a space and `;` between them when there are duplicates, e.g. `[class_ "x",class_ "y"]` produces `class="x y"`. These are special cases, the rest of the attributes do not have special combining behavior and will be simple concatenation.
 
 Renamed:
 
diff --git a/lucid2.cabal b/lucid2.cabal
--- a/lucid2.cabal
+++ b/lucid2.cabal
@@ -1,5 +1,5 @@
 name:                lucid2
-version:             0.0.20220508
+version:             0.0.20220509
 synopsis:            Clear to write, read and edit DSL for HTML
 description:
   Clear to write, read and edit DSL for HTML.
diff --git a/src/Lucid/Base.hs b/src/Lucid/Base.hs
--- a/src/Lucid/Base.hs
+++ b/src/Lucid/Base.hs
@@ -45,9 +45,11 @@
 import qualified Blaze.ByteString.Builder.Html.Utf8 as Blaze
 import           Control.Applicative
 import           Control.Monad
-import           Control.Monad.Error.Class (MonadError(..))
-import           Control.Monad.Reader
+import           Control.Monad.Fix (MonadFix(..))
+import           Control.Monad.IO.Class (MonadIO(..))
+import           Control.Monad.Reader (MonadReader(..))
 import           Control.Monad.State.Class (MonadState(..))
+import           Control.Monad.Trans (MonadTrans(..))
 import           Control.Monad.Trans.State.Strict (StateT(..), modify')
 import qualified Data.ByteString as S
 import           Data.ByteString.Lazy (ByteString)