diff --git a/servant-client/servant-client.cabal b/servant-client/servant-client.cabal
index 685692bf..0d70cea6 100644
--- a/servant-client/servant-client.cabal
+++ b/servant-client/servant-client.cabal
@@ -44,6 +44,7 @@ library
     , string-conversions
     , text
     , transformers
+    , transformers-compat
   hs-source-dirs: src
   default-language: Haskell2010
   ghc-options: -Wall
@@ -61,6 +62,7 @@ test-suite spec
   build-depends:
       base == 4.*
     , transformers
+    , transformers-compat
     , aeson
     , bytestring
     , deepseq
diff --git a/servant-examples/servant-examples.cabal b/servant-examples/servant-examples.cabal
index 3ff76755..41533dee 100644
--- a/servant-examples/servant-examples.cabal
+++ b/servant-examples/servant-examples.cabal
@@ -37,6 +37,7 @@ executable tutorial
     , text
     , time
     , transformers
+    , transformers-compat
     , wai
     , warp
   hs-source-dirs: tutorial
@@ -53,6 +54,7 @@ executable t8-main
     , servant-client == 0.5.*
     , servant-server == 0.5.*
     , transformers
+    , transformers-compat
     , wai
 
 executable hackage
@@ -64,6 +66,7 @@ executable hackage
     , servant-client == 0.5.*
     , text
     , transformers
+    , transformers-compat
   hs-source-dirs:      hackage
   default-language:    Haskell2010
 
diff --git a/servant-server/servant-server.cabal b/servant-server/servant-server.cabal
index 0d26ac7b..74a6045e 100644
--- a/servant-server/servant-server.cabal
+++ b/servant-server/servant-server.cabal
@@ -61,6 +61,7 @@ library
       , filepath           >= 1
       , text               >= 1.2  && < 1.3
       , transformers       >= 0.3  && < 0.5
+      , transformers-compat>= 0.4
       , wai                >= 3.0  && < 3.1
       , wai-app-static     >= 3.0  && < 3.2
       , warp               >= 3.0  && < 3.2
@@ -109,6 +110,7 @@ test-suite spec
     , temporary
     , text
     , transformers
+    , transformers-compat
     , mtl
     , wai
     , wai-extra