diff --git a/dataframe-json.cabal b/dataframe-json.cabal
--- a/dataframe-json.cabal
+++ b/dataframe-json.cabal
@@ -1,6 +1,6 @@
 cabal-version:      2.4
 name:               dataframe-json
-version:            1.0.0.0
+version:            1.0.1.0
 
 synopsis:           JSON reader and writer for the dataframe ecosystem.
 description:
@@ -22,6 +22,7 @@
         -Wincomplete-uni-patterns
         -Wunused-imports
         -Wunused-local-binds
+        -Wunused-packages
 
 library
     import:             warnings
@@ -29,9 +30,7 @@
     build-depends:      base >= 4 && < 5,
                         aeson >= 0.11.0.0 && < 3,
                         bytestring >= 0.11 && < 0.13,
-                        containers >= 0.6.7 && < 0.9,
                         dataframe-core ^>= 1.0,
-                        dataframe-operations ^>= 1.0,
                         scientific >= 0.3.1 && < 0.4,
                         text >= 2.0 && < 3,
                         vector ^>= 0.13
diff --git a/src/DataFrame/IO/JSON.hs b/src/DataFrame/IO/JSON.hs
--- a/src/DataFrame/IO/JSON.hs
+++ b/src/DataFrame/IO/JSON.hs
@@ -18,7 +18,6 @@
 
 import qualified DataFrame.Internal.Column as D
 import qualified DataFrame.Internal.DataFrame as D
-import qualified DataFrame.Operations.Core as D
 
 readJSONEither :: LBS.ByteString -> Either String D.DataFrame
 readJSONEither bs = do