diff --git a/servant-foreign.cabal b/servant-foreign.cabal
--- a/servant-foreign.cabal
+++ b/servant-foreign.cabal
@@ -1,6 +1,6 @@
 cabal-version:       2.2
 name:                servant-foreign
-version:             0.16
+version:             0.16.1
 
 synopsis:            Helpers for generating clients for servant APIs in any programming language
 category:            Servant, Web
@@ -21,7 +21,7 @@
 maintainer:          haskell-servant-maintainers@googlegroups.com
 copyright:           2015-2019 Servant Contributors
 build-type:          Simple
-tested-with:         GHC==8.6.5, GHC==8.8.4, GHC ==8.10.7, GHC ==9.0.2, GHC ==9.2.7, GHC ==9.4.4
+tested-with: GHC ==8.10.7, GHC ==9.0.2, GHC ==9.2.8, GHC ==9.4.8, GHC ==9.6.4, GHC ==9.8.2, GHC ==9.10.1
 
 extra-source-files:
   CHANGELOG.md
@@ -41,18 +41,18 @@
   --
   -- note: mtl lower bound is so low because of GHC-7.8
   build-depends:
-      base        >= 4.9     && < 4.19
-    , text        >= 1.2.3.0 && < 2.1
+      base        >= 4.14    && < 4.21
+    , text        >= 1.2.3.0 && < 2.2
 
   -- Servant dependencies
   build-depends:
-      servant            >=0.20 && <0.21
+      servant            >=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.
   build-depends:
-      base-compat >= 0.10.5  && < 0.14
-    , lens        >= 4.17    && < 5.3
+      base-compat >= 0.10.5  && < 0.15
+    , lens        >= 4.17    && < 5.4
     , http-types  >= 0.12.2  && < 0.13
 
   hs-source-dirs:      src
@@ -74,7 +74,7 @@
 
   -- Additional dependencies
   build-depends:
-    hspec >= 2.6.0 && <2.11
+    hspec >= 2.6.0 && <2.12
   build-tool-depends:
-    hspec-discover:hspec-discover >=2.6.0 && <2.11
+    hspec-discover:hspec-discover >=2.6.0 && <2.12
   default-language:  Haskell2010
diff --git a/src/Servant/Foreign/Internal.hs b/src/Servant/Foreign/Internal.hs
--- a/src/Servant/Foreign/Internal.hs
+++ b/src/Servant/Foreign/Internal.hs
@@ -22,6 +22,8 @@
                  (Getter, makeLenses, makePrisms, (%~), (&), (.~), (<>~))
 import           Data.Data
                  (Data)
+import           Data.Kind
+                 (Type)
 import           Data.Proxy
 import           Data.String
 import           Data.Text
@@ -274,8 +276,8 @@
 -- | Implementation of the Servant framework types.
 --
 -- Relevant instances: Everything containing 'HasForeignType'.
-class HasForeign lang ftype (api :: *) where
-  type Foreign ftype api :: *
+class HasForeign lang ftype (api :: Type) where
+  type Foreign ftype api :: Type
   foreignFor :: Proxy lang -> Proxy ftype -> Proxy api -> Req ftype -> Foreign ftype api
 
 instance (HasForeign lang ftype a, HasForeign lang ftype b)