diff --git a/json-spec-openapi.cabal b/json-spec-openapi.cabal
--- a/json-spec-openapi.cabal
+++ b/json-spec-openapi.cabal
@@ -1,6 +1,6 @@
 cabal-version:       3.0
 name:                json-spec-openapi
-version:             0.2.1.0
+version:             0.2.1.1
 synopsis:            json-spec-openapi
 description:
   This package provides a way to produce
@@ -64,7 +64,7 @@
   build-depends:
     , aeson                     >= 2.2.1.0  && < 2.3
     , base                      >= 4.19.0.0 && < 4.20
-    , insert-ordered-containers >= 0.2.5.3 && < 0.3
+    , insert-ordered-containers >= 0.2.5.3  && < 0.3
     , json-spec                 >= 0.2.1.3  && < 0.3
     , lens                      >= 5.2.3    && < 5.3
     , openapi3                  >= 3.2.4    && < 3.3
@@ -77,6 +77,7 @@
     -Wmissing-import-lists
     -Wredundant-constraints
     -Wall
+    -Wunused-packages
 
 library
   import: dependencies, warnings
@@ -96,7 +97,6 @@
   build-depends:
     , json-spec-openapi
 
-    , bytestring >= 0.12.0.2 && < 0.13
     , hspec      >= 2.11.1   && < 2.12
     , time       >= 1.12.2   && < 1.13