diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,15 @@
 
 Package versions follow the [Package Versioning Policy](https://pvp.haskell.org/): in A.B.C, bumps to either A or B represent major versions.
 
+0.20.2
+------
+
+- Client Middleware [#1720](https://github.com/haskell-servant/servant/pull/1720)
+
+  Clients now support real middleware of type `(Request -> ClientM Response) -> Request -> ClientM Response` which can be configured in `ClientEnv`.
+  This allows access to raw request and response data. It can also be used to control how/when/if actual requests are performed.
+  Middleware can be chained with function composition `mid1 . mid2 . mid3`.
+
 0.20
 ----
 
diff --git a/servant-client.cabal b/servant-client.cabal
--- a/servant-client.cabal
+++ b/servant-client.cabal
@@ -1,6 +1,6 @@
 cabal-version:      3.0
 name:               servant-client
-version:            0.20.1
+version:            0.20.2
 synopsis:           Automatic derivation of querying functions for servant
 category:           Servant, Web
 description:
@@ -22,7 +22,7 @@
 
 build-type:         Simple
 tested-with:
-  GHC ==8.10.7 || ==9.0.2 || ==9.2.8 || ==9.4.8 || ==9.6.4 || ==9.8.2
+  GHC ==8.10.7 || ==9.0.2 || ==9.2.8 || ==9.4.8 || ==9.6.4 || ==9.8.2 || ==9.10.1
 
 extra-source-files:
   CHANGELOG.md
@@ -94,9 +94,9 @@
   -- Bundled with GHC: Lower bound to not force re-installs
   -- text and mtl are bundled starting with GHC-8.4
   build-depends:
-    , base          >=4.9      && <4.20
+    , base          >=4.14     && <4.21
     , bytestring    >=0.10.8.1 && <0.13
-    , containers    >=0.5.7.1  && <0.7
+    , containers    >=0.5.7.1  && <0.8
     , deepseq       >=1.4.2.0  && <1.6
     , mtl           ^>=2.2.2   || ^>=2.3.1
     , stm           >=2.4.5.1  && <2.6
@@ -106,8 +106,8 @@
   -- Servant dependencies.
   -- Strict dependency on `servant-client-core` as we re-export things.
   build-depends:
-    , servant              >=0.20 && <0.21
-    , servant-client-core  >=0.20.1 && <0.21
+    , servant              >=0.20.2 && <0.21
+    , servant-client-core  >=0.20.2 && <0.21
 
   -- Other dependencies: Lower bound around what is in the latest Stackage LTS.
   -- Here can be exceptions if we really need features from the newer versions.
@@ -174,9 +174,9 @@
     , hspec           >=2.6.0    && <2.12
     , HUnit           >=1.6.0.0  && <1.7
     , network         >=2.8.0.0  && <3.3
-    , QuickCheck      >=2.12.6.1 && <2.15
-    , servant         >=0.20     && <0.21
-    , servant-server  >=0.20     && <0.21
+    , QuickCheck      >=2.12.6.1 && <2.16
+    , servant         >=0.20.2   && <0.21
+    , servant-server  >=0.20.2   && <0.21
 
   build-tool-depends: hspec-discover:hspec-discover >=2.6.0 && <2.12
 
diff --git a/src/Servant/Client/Internal/HttpClient.hs b/src/Servant/Client/Internal/HttpClient.hs
--- a/src/Servant/Client/Internal/HttpClient.hs
+++ b/src/Servant/Client/Internal/HttpClient.hs
@@ -33,10 +33,9 @@
 import           Data.ByteString.Builder
                  (toLazyByteString)
 import qualified Data.ByteString.Lazy        as BSL
-#if !MIN_VERSION_base_compat(0,14,0)
-import           Data.Foldable (foldl')
-#endif
-import           Data.Foldable (toList)
+import qualified Data.List as List
+import           Data.Foldable
+                 (toList)
 import           Data.Functor.Alt
                  (Alt (..))
 import           Data.Maybe
@@ -294,7 +293,7 @@
 
     -- Query string builder which does not do any encoding
     buildQueryString [] = mempty
-    buildQueryString qps = "?" <> foldl' addQueryParam mempty qps
+    buildQueryString qps = "?" <> List.foldl' addQueryParam mempty qps
 
     addQueryParam qs (k, v) =
           qs <> (if BS.null qs then mempty else "&") <> urlEncode True k <> foldMap ("=" <>) v