diff --git a/docx-core/src/documents/webextension.rs b/docx-core/src/documents/webextension.rs
index 14f384c..19a3e28 100644
--- a/docx-core/src/documents/webextension.rs
+++ b/docx-core/src/documents/webextension.rs
@@ -45,8 +45,10 @@ impl WebExtension {
     }
 
     pub fn property(mut self, name: impl Into<String>, value: impl Into<String>) -> Self {
+        let v = value.into();
+        let v = format!("&quot;{}&quot;", escape(&v).replace("&quot;", "\\&quot;"));
         self.properties
-            .push(WebExtensionProperty::new(name, escape(&value.into())));
+            .push(WebExtensionProperty::new(name, &v));
         self
     }
 }
@@ -103,7 +105,7 @@ mod tests {
   <we:reference id="7f33b723-fb58-4524-8733-dbedc4b7c095" version="1.0.0.0" store="developer" storeType="Registry" />
   <we:alternateReferences />
   <we:properties>
-    <we:property name="hello" value="world" />
+    <we:property name="hello" value="&quot;world&quot;" />
   </we:properties>
   <we:bindings />
   <we:snapshot xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships" />
diff --git a/docx-wasm/package.json b/docx-wasm/package.json
index 25520a0..449feef 100644
--- a/docx-wasm/package.json
+++ b/docx-wasm/package.json
@@ -1,6 +1,6 @@
 {
   "name": "docx-wasm",
-  "version": "0.0.200",
+  "version": "0.0.201",
   "main": "dist/node/index.js",
   "browser": "dist/web/index.js",
   "author": "bokuweb <bokuweb12@gmail.com>",
diff --git a/docx-wasm/test/__snapshots__/index.test.js.snap b/docx-wasm/test/__snapshots__/index.test.js.snap
index ae2902a..a7cd457 100644
--- a/docx-wasm/test/__snapshots__/index.test.js.snap
+++ b/docx-wasm/test/__snapshots__/index.test.js.snap
@@ -17212,7 +17212,7 @@ exports[`writer should write webextension 7`] = `
   <we:reference id=\\"7f33b723-fb58-4524-8733-dbedc4b7c095\\" version=\\"1.0.0.0\\" store=\\"developer\\" storeType=\\"Registry\\" />
   <we:alternateReferences />
   <we:properties>
-    <we:property name=\\"hello\\" value=\\"&quot;world&quot;\\" />
+    <we:property name=\\"hello\\" value=\\"&quot;{\\\\&quot;hello\\\\&quot;:\\\\&quot;world\\\\&quot;}&quot;\\" />
   </we:properties>
   <we:bindings />
   <we:snapshot xmlns:r=\\"http://schemas.openxmlformats.org/officeDocument/2006/relationships\\" />
diff --git a/docx-wasm/test/index.test.js b/docx-wasm/test/index.test.js
index f2696b5..6e28d04 100644
--- a/docx-wasm/test/index.test.js
+++ b/docx-wasm/test/index.test.js
@@ -306,7 +306,7 @@ describe("writer", () => {
           "1.0.0.0",
           "developer",
           "Registry"
-        ).property("hello", '"world"')
+        ).property("hello", JSON.stringify({ hello: "world" }))
       )
       .build();
     writeFileSync("../output/webextension.docx", buffer);