2 files changed, 12 insertions, 4 deletions
diff --git a/htmtl/attribute_parsers/inner_text.py b/htmtl/attribute_parsers/inner_text.py
index 9195802..75ad01e 100644
--- a/htmtl/attribute_parsers/inner_text.py
+++ b/htmtl/attribute_parsers/inner_text.py
@@ -1,9 +1,13 @@
+from typing import Optional
+
 from dompa.nodes import Node, TextNode
 from ..attribute_parser import AttributeParser
 
 
 class InnerText(AttributeParser):
-    def traverse(self, node: Node):
+    def traverse(self, node: Node) -> Optional[Node]:
         if "inner-text" in node.attributes:
             node.children = [TextNode(value=self.expression(node.attributes["inner-text"]))]
-            node.attributes.pop("inner-text")
-\ No newline at end of file
+            node.attributes.pop("inner-text")
+
+        return node
+\ No newline at end of file
diff --git a/htmtl/attribute_parsers/outer_text.py b/htmtl/attribute_parsers/outer_text.py
index 8d89b14..8e9bead 100644
--- a/htmtl/attribute_parsers/outer_text.py
+++ b/htmtl/attribute_parsers/outer_text.py
@@ -1,8 +1,12 @@
+from typing import Optional
+
 from dompa.nodes import Node, TextNode
 from ..attribute_parser import AttributeParser
 
 
 class OuterText(AttributeParser):
-    def traverse(self, node: Node):
+    def traverse(self, node: Node) -> Optional[Node]:
         if "outer-text" in node.attributes:
-            node.replace_with(TextNode(value=self.expression(node.attributes["outer-text"])))
+            return TextNode(value=self.expression(node.attributes["outer-text"]))
+
+        return node