diff --git a/json-spec.cabal b/json-spec.cabal
--- a/json-spec.cabal
+++ b/json-spec.cabal
@@ -1,6 +1,6 @@
 cabal-version:       3.0
 name:                json-spec
-version:             0.2.1.2
+version:             0.2.1.3
 synopsis:            Type-level JSON specification
 maintainer:          rick@owensmurray.com
 description:         = Motivation
@@ -117,7 +117,7 @@
 common dependencies
   build-depends:
     , aeson      >= 2.0.3.0  && < 2.3
-    , base       >= 4.15.0.0 && < 4.20
+    , base       >= 4.16.0.0 && < 4.20
     , containers >= 0.6.4.1  && < 0.7
     , scientific >= 0.3.7.0  && < 0.4
     , text       >= 1.2.5.0  && < 2.2
@@ -152,5 +152,5 @@
   default-language: Haskell2010
   build-depends:
     , json-spec
-    , bytestring >= 0.10.12.1 && < 0.12
-    , hspec      >= 2.8.5     && < 2.12
+    , bytestring >= 0.11.1.0 && < 0.12
+    , hspec      >= 2.8.5    && < 2.12