diff --git a/python/stencila/schema/types.py b/python/stencila/schema/types.py
index 6eb3f02c..2f287b96 100644
--- a/python/stencila/schema/types.py
+++ b/python/stencila/schema/types.py
@@ -2079,7 +2079,7 @@ def __init__(
 class ListItem(Thing):
     """A single item in a list."""
 
-    content: Optional[Array["Node"]] = None
+    content: Optional[Union[Array["BlockContent"], Array["InlineContent"]]] = None
     """The content of the list item."""
 
     isChecked: Optional[bool] = None
@@ -2095,7 +2095,7 @@ class ListItem(Thing):
     def __init__(
         self,
         alternateNames: Optional[Array[str]] = None,
-        content: Optional[Array["Node"]] = None,
+        content: Optional[Union[Array["BlockContent"], Array["InlineContent"]]] = None,
         description: Optional[Union[Array["BlockContent"], Array["InlineContent"], str]] = None,
         id: Optional[str] = None,
         identifiers: Optional[Array[Union["PropertyValue", str]]] = None,
diff --git a/r/R/types.R b/r/R/types.R
index 46d049e8..6d6cfbf5 100644
--- a/r/R/types.R
+++ b/r/R/types.R
@@ -2308,7 +2308,7 @@ ListItem <- function(
     url = url
   )
   self$type <- as_scalar("ListItem")
-  self[["content"]] <- check_property("ListItem", "content", FALSE, missing(content), Array(Node), content)
+  self[["content"]] <- check_property("ListItem", "content", FALSE, missing(content), Union(Array(BlockContent), Array(InlineContent)), content)
   self[["isChecked"]] <- check_property("ListItem", "isChecked", FALSE, missing(isChecked), "logical", isChecked)
   self[["item"]] <- check_property("ListItem", "item", FALSE, missing(item), Node, item)
   self[["position"]] <- check_property("ListItem", "position", FALSE, missing(position), "numeric", position)
@@ -4114,9 +4114,9 @@ Table <- function(
 #' A cell within a `Table`.
 #'
 #' @name TableCell
-#' @param content Contents of the table cell. \bold{Required}.
 #' @param cellType Indicates whether the cell is a header or data.
 #' @param colspan How many columns the cell extends.
+#' @param content Contents of the table cell.
 #' @param id The identifier for this item.
 #' @param meta Metadata associated with this item.
 #' @param name The name of the cell.
@@ -4125,9 +4125,9 @@ Table <- function(
 #' @seealso \code{\link{Entity}}
 #' @export
 TableCell <- function(
-  content,
   cellType,
   colspan,
+  content,
   id,
   meta,
   name,
@@ -4138,9 +4138,9 @@ TableCell <- function(
     meta = meta
   )
   self$type <- as_scalar("TableCell")
-  self[["content"]] <- check_property("TableCell", "content", TRUE, missing(content), Union(Array(BlockContent), Array(InlineContent)), content)
   self[["cellType"]] <- check_property("TableCell", "cellType", FALSE, missing(cellType), Enum("Data", "Header"), cellType)
   self[["colspan"]] <- check_property("TableCell", "colspan", FALSE, missing(colspan), "numeric", colspan)
+  self[["content"]] <- check_property("TableCell", "content", FALSE, missing(content), Union(Array(BlockContent), Array(InlineContent)), content)
   self[["name"]] <- check_property("TableCell", "name", FALSE, missing(name), "character", name)
   self[["rowspan"]] <- check_property("TableCell", "rowspan", FALSE, missing(rowspan), "numeric", rowspan)
   class(self) <- c(class(self), "TableCell")
diff --git a/rust/src/types.rs b/rust/src/types.rs
index 31f9beaa..b364bf30 100644
--- a/rust/src/types.rs
+++ b/rust/src/types.rs
@@ -2107,7 +2107,7 @@ pub struct ListItem {
     pub alternate_names: Option<Vec<String>>,
 
     /// The content of the list item.
-    pub content: Option<Vec<Node>>,
+    pub content: Option<ListItemContent>,
 
     /// A description of the item.
     pub description: Option<ThingDescription>,
@@ -4330,6 +4330,14 @@ pub enum ListOrder {
     Unordered,
 }
 
+/// Types permitted for the `content` property of a `ListItem` node.
+#[derive(Clone, Debug, Serialize, Deserialize)]
+#[serde(untagged)]
+pub enum ListItemContent {
+    VecBlockContent(Vec<BlockContent>),
+    VecInlineContent(Vec<InlineContent>),
+}
+
 /// Types permitted for the `funders` property of a `MonetaryGrant` node.
 #[derive(Clone, Debug, Serialize, Deserialize)]
 #[serde(untagged)]
diff --git a/schema/ListItem.schema.yaml b/schema/ListItem.schema.yaml
index 3f422e21..1427f84d 100644
--- a/schema/ListItem.schema.yaml
+++ b/schema/ListItem.schema.yaml
@@ -19,9 +19,13 @@ properties:
     '@id': stencila:content
     description: The content of the list item.
     $comment: Use either `content` or `item`, not both.
-    type: array
-    items:
-      $ref: Node
+    anyOf:
+      - type: array
+        items:
+          $ref: BlockContent
+      - type: array
+        items:
+          $ref: InlineContent
   isChecked:
     '@id': stencila:isChecked
     description: A flag to indicate if this list item is checked.