diff --git a/aeson.cabal b/aeson.cabal
index 5a24f64e..6f2bd6c4 100644
--- a/aeson.cabal
+++ b/aeson.cabal
@@ -127,7 +127,7 @@ library
     , network-uri           ^>=2.6.4.1
     , OneTuple              ^>=0.4.1.1
     , primitive             ^>=0.8.0.0  || ^>=0.9.0.0
-    , QuickCheck            ^>=2.14.3   || ^>=2.15    || ^>=2.16.0.0 || ^>=2.17.1.0 || ^>=2.18.0.0
+    , QuickCheck            ^>=2.14.3   || ^>=2.15    || ^>=2.16.0.0 || ^>=2.17.1.0 || ^>=2.18.0.0 || ^>= 2.19.0.0
     , scientific            ^>=0.3.7.0
     , semialign             ^>=1.3      || ^>=1.4
     , strict                ^>=0.5
diff --git a/text-iso8601/text-iso8601.cabal b/text-iso8601/text-iso8601.cabal
index a4e92f29..18f21fd1 100644
--- a/text-iso8601/text-iso8601.cabal
+++ b/text-iso8601/text-iso8601.cabal
@@ -69,7 +69,7 @@ test-suite text-iso8601-tests
 
   -- test dependencies
   build-depends:
-      QuickCheck            >=2.14.3   && <2.19
+      QuickCheck            >=2.14.3   && <2.20
     , quickcheck-instances  >=0.3.29.1 && <0.5
     , tasty                 >=1.4.3    && <1.6
     , tasty-hunit           >=0.10.0.3 && <0.11