diff --git a/servant-quickcheck.cabal b/servant-quickcheck.cabal
index af06837..68eb725 100644
--- a/servant-quickcheck.cabal
+++ b/servant-quickcheck.cabal
@@ -44,14 +44,15 @@ library
                      , case-insensitive == 1.2.*
                      , clock >= 0.7 && < 0.8
                      , data-default-class >= 0.0 && < 0.2
-                     , hspec >= 2.5 && < 2.6
+                     , hspec >= 2.5.5 && < 2.6
+
                      , http-client >= 0.4.30 && < 0.6
                      , http-media >= 0.6 && <0.8
                      , http-types > 0.8 && < 0.13
                      , mtl > 2.1 && < 2.3
                      , pretty == 1.1.*
                      , process >= 1.2 && < 1.7
-                     , QuickCheck > 2.7 && < 2.12
+                     , QuickCheck > 2.7 && < 2.13
                      , servant >= 0.13 && < 0.15
                      , servant-client >= 0.13 && < 0.15
                      , servant-server >= 0.13 && < 0.15
@@ -99,7 +100,7 @@ test-suite spec
                      , servant-quickcheck
                      , bytestring
                      , hspec
-                     , hspec-core
+                     , hspec-core >= 2.5.5 && < 2.6
                      , http-client
                      , blaze-html
                      , warp
diff --git a/src/Servant/QuickCheck/Internal/QuickCheck.hs b/src/Servant/QuickCheck/Internal/QuickCheck.hs
index df89bf4..2a1b678 100644
--- a/src/Servant/QuickCheck/Internal/QuickCheck.hs
+++ b/src/Servant/QuickCheck/Internal/QuickCheck.hs
@@ -92,7 +92,10 @@ serversEqual api burl1 burl2 args req = do
           expectationFailure $ "We failed to record a reason for failure: " <> show r
     GaveUp { numTests = n } -> expectationFailure $ "Gave up after " ++ show n ++ " tests"
     NoExpectedFailure {} -> expectationFailure "No expected failure"
+#if MIN_VERSION_QuickCheck(2,12,0)
+#else
     InsufficientCoverage {} -> expectationFailure "Insufficient coverage"
+#endif
 
 -- | Check that a server satisfies the set of properties specified.
 --
@@ -145,7 +148,10 @@ serverSatisfiesMgr api manager burl args preds = do
           expectationFailure $ "We failed to record a reason for failure: " <> show r
     GaveUp { numTests = n } -> expectationFailure $ "Gave up after " ++ show n ++ " tests"
     NoExpectedFailure {} -> expectationFailure $ "No expected failure"
-    InsufficientCoverage {} -> expectationFailure $ "Insufficient coverage"
+#if MIN_VERSION_QuickCheck(2,12,0)
+#else
+    InsufficientCoverage {} -> expectationFailure "Insufficient coverage"
+#endif
 
 serverDoesntSatisfy :: (HasGenRequest a) =>
   Proxy a -> BaseUrl -> Args -> Predicates -> Expectation
@@ -163,7 +169,10 @@ serverDoesntSatisfyMgr api manager burl args preds = do
     GaveUp { numTests = n } -> expectationFailure $ "Gave up after " ++ show n ++ " tests"
     Failure { output = m } -> expectationFailure $ "Failed:\n" ++ show m
     NoExpectedFailure {} -> expectationFailure $ "No expected failure"
-    InsufficientCoverage {} -> expectationFailure $ "Insufficient coverage"
+#if MIN_VERSION_QuickCheck(2,12,0)
+#else
+    InsufficientCoverage {} -> expectationFailure "Insufficient coverage"
+#endif
 
 noCheckStatus :: C.Request -> C.Request
 #if MIN_VERSION_http_client(0,5,0)
diff --git a/stack.yaml b/stack.yaml
index bf867f3..6e2b331 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -1,14 +1,15 @@
-resolver: lts-11.8
+resolver: nightly-2018-09-03
 packages:
 - '.'
 extra-deps:
 - base-compat-batteries-0.10.1
 - base-compat-0.10.1
-- hspec-discover-2.5.0
-- hspec-core-2.5.0
-- hspec-2.5.0
+- hspec-discover-2.5.6
+- hspec-core-2.5.6
+- hspec-2.5.6
 # aeson pre-1.3.1.0 has an upper bound on `base-compat-batteries` that preclude
 # the 0.10.1 that we depend on
-- aeson-1.3.1.0
+# - aeson-1.3.1.0
+- QuickCheck-2.12
 flags: {}
 extra-package-dbs: []