diff --git a/colorless.cabal b/colorless.cabal
--- a/colorless.cabal
+++ b/colorless.cabal
@@ -3,7 +3,7 @@
 -- see: https://github.com/sol/hpack
 
 name:           colorless
-version:        2.2.10
+version:        2.2.11
 synopsis:       Colorless
 description:    Colorless
 category:       Web
diff --git a/library/Colorless/Ast.hs b/library/Colorless/Ast.hs
--- a/library/Colorless/Ast.hs
+++ b/library/Colorless/Ast.hs
@@ -365,7 +365,7 @@
   parseJSON _ = mzero
 
 instance ToJSON List where
-  toJSON List{list} = toJSON $ "list" : map toJSON list
+  toJSON List{list} = toJSON $ "list" : [toJSON list]
 
 data Tuple = Tuple
   { tuple :: [Ast]
diff --git a/package.yaml b/package.yaml
--- a/package.yaml
+++ b/package.yaml
@@ -1,5 +1,5 @@
 name: colorless
-version: '2.2.10'
+version: '2.2.11'
 category: Web
 synopsis: Colorless
 description: Colorless