diff --git a/servant-server/test/Servant/Server/Internal/ContextSpec.hs b/servant-server/test/Servant/Server/Internal/ContextSpec.hs
index 93e1dcb8..0132f396 100644
--- a/servant-server/test/Servant/Server/Internal/ContextSpec.hs
+++ b/servant-server/test/Servant/Server/Internal/ContextSpec.hs
@@ -1,5 +1,5 @@
 {-# LANGUAGE DataKinds #-}
-{-# OPTIONS_GHC -fdefer-type-errors -Wwarn #-}
+{-# OPTIONS_GHC -fdefer-type-errors -Wwarn -Wno-deferred-type-errors #-}
 module Servant.Server.Internal.ContextSpec (spec) where
 
 import           Data.Proxy
diff --git a/stack.yaml b/stack.yaml
index 491c55b1..def7c40e 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,4 +1,4 @@
-resolver: lts-14.17
+resolver: lts-16.24
 packages:
 - servant-client-core/
 - servant-client/