diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,14 @@
 
 `hslua-aeson` uses [PVP Versioning][].
 
+## hslua-aeson-2.2.0.1
+
+Released 2022-06-16.
+
+-   Relaxed upper bound for mtl, allowing mtl-2.3.
+
+-   Relaxed upper bound for aeson, allowing aeson-2.1.
+
 ## hslua-aeson-2.2.0
 
 Released 2022-02-19.
diff --git a/hslua-aeson.cabal b/hslua-aeson.cabal
--- a/hslua-aeson.cabal
+++ b/hslua-aeson.cabal
@@ -1,6 +1,6 @@
 cabal-version:       2.2
 name:                hslua-aeson
-version:             2.2.0
+version:             2.2.0.1
 synopsis:            Allow aeson data types to be used with Lua.
 description:         This package provides instances to push and receive any
                      datatype encodable as JSON to and from the Lua stack.
@@ -30,13 +30,13 @@
 common common-options
   default-language:    Haskell2010
   build-depends:       base                 >= 4.8    && < 5
-                     , aeson                >= 1.5    && < 2.1
+                     , aeson                >= 1.5    && < 2.2
                      , bytestring           >= 0.10.2 && < 0.12
                      , containers           >= 0.5.9  && < 0.7
                      , hashable             >= 1.2    && < 1.5
                      , hslua-core           >= 2.0    && < 2.3
                      , hslua-marshalling    >= 2.1    && < 2.3
-                     , mtl                  >= 2.2    && < 2.3
+                     , mtl                  >= 2.2    && < 2.4
                      , scientific           >= 0.3    && < 0.4
                      , unordered-containers >= 0.2    && < 0.3
                      , text                 >= 1.2    && < 2.1