diff --git a/dataframe-json.cabal b/dataframe-json.cabal
--- a/dataframe-json.cabal
+++ b/dataframe-json.cabal
@@ -1,6 +1,6 @@
 cabal-version:      3.4
 name:               dataframe-json
-version:            1.2.0.1
+version:            1.2.0.2
 synopsis:           JSON reader and writer for the dataframe ecosystem.
 description:
     @DataFrame.IO.JSON@ — read/write arrays of JSON objects as
@@ -29,7 +29,7 @@
     build-depends:      base >= 4 && < 5,
                         aeson >= 0.11.0.0 && < 3,
                         bytestring >= 0.11 && < 0.14,
-                        dataframe-core >= 2.2 && < 2.3,
+                        dataframe-core >= 2.6 && < 2.7,
                         scientific >= 0.3.1 && < 0.5,
                         text >= 2.1 && < 3,
                         vector >= 0.13 && < 0.15
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
@@ -34,7 +34,7 @@
         let col = buildColumn rows c
         pure (c, col)
 
-    pure $ D.fromNamedColumns columns
+    pure $ D.fromColumns columns
 
 readJSON :: FilePath -> IO D.DataFrame
 readJSON path = do