diff --git a/docx/scripts/office/schemas/microsoft/wml-2018.xsd b/docx/scripts/office/schemas/microsoft/wml-2018.xsd
new file mode 100644
index 0000000..ca528a3
--- /dev/null
+++ b/docx/scripts/office/schemas/microsoft/wml-2018.xsd
@@ -0,0 +1,14 @@
+<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:w12="http://schemas.openxmlformats.org/wordprocessingml/2006/main" elementFormDefault="qualified" attributeFormDefault="qualified" blockDefault="#all" xmlns="http://schemas.microsoft.com/office/word/2018/wordml" targetNamespace="http://schemas.microsoft.com/office/word/2018/wordml">
+  <xsd:import id="w12" namespace="http://schemas.openxmlformats.org/wordprocessingml/2006/main" schemaLocation="../ISO-IEC29500-4_2016/wml.xsd"/>
+  <xsd:complexType name="CT_Extension">
+    <xsd:sequence>
+      <xsd:any processContents="lax"/>
+    </xsd:sequence>
+    <xsd:attribute name="uri" type="xsd:token"/>
+  </xsd:complexType>
+  <xsd:complexType name="CT_ExtensionList">
+    <xsd:sequence>
+      <xsd:element name="ext" type="CT_Extension" minOccurs="0" maxOccurs="unbounded"/>
+    </xsd:sequence>
+  </xsd:complexType>
+</xsd:schema>
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