diff --git a/docx-core/src/documents/elements/page_num.rs b/docx-core/src/documents/elements/page_num.rs
index 8e0c22f..c9210ff 100644
--- a/docx-core/src/documents/elements/page_num.rs
+++ b/docx-core/src/documents/elements/page_num.rs
@@ -7,6 +7,7 @@ use crate::xml_builder::*;
 #[derive(Serialize, Debug, Clone, PartialEq)]
 pub struct PageNum {
     pub instr: InstrPAGE,
+    #[serde(skip_serializing_if = "Option::is_none")]
     pub frame_property: Option<FrameProperty>,
 }
 
@@ -14,14 +15,7 @@ impl Default for PageNum {
     fn default() -> Self {
         Self {
             instr: InstrPAGE {},
-            frame_property: Some(FrameProperty {
-                wrap: Some("none".to_owned()),
-                v_anchor: Some("text".to_owned()),
-                h_anchor: Some("margin".to_owned()),
-                x_align: Some("right".to_owned()),
-                y: Some(1),
-                ..Default::default()
-            }),
+            frame_property: None,
         }
     }
 }
@@ -180,7 +174,7 @@ mod tests {
         let b = PageNum::new().build();
         assert_eq!(
             str::from_utf8(&b).unwrap(),
-            r#"<w:sdt><w:sdtPr><w:rPr /></w:sdtPr><w:sdtContent><w:p w14:paraId="12345678"><w:pPr><w:rPr /><w:framePr w:wrap="none" w:hAnchor="margin" w:vAnchor="text" w:xAlign="right" w:y="1" /></w:pPr><w:r><w:rPr /><w:fldChar w:fldCharType="begin" w:dirty="false" /><w:instrText>PAGE</w:instrText><w:fldChar w:fldCharType="separate" w:dirty="false" /><w:t xml:space="preserve">1</w:t><w:fldChar w:fldCharType="end" w:dirty="false" /></w:r></w:p></w:sdtContent>
+            r#"<w:sdt><w:sdtPr><w:rPr /></w:sdtPr><w:sdtContent><w:p w14:paraId="12345678"><w:pPr><w:rPr /></w:pPr><w:r><w:rPr /><w:fldChar w:fldCharType="begin" w:dirty="false" /><w:instrText>PAGE</w:instrText><w:fldChar w:fldCharType="separate" w:dirty="false" /><w:t xml:space="preserve">1</w:t><w:fldChar w:fldCharType="end" w:dirty="false" /></w:r></w:p></w:sdtContent>
 </w:sdt>"#
         );
     }
@@ -190,7 +184,7 @@ mod tests {
         let b = PageNum::new().wrap("none").x_align("left").build();
         assert_eq!(
             str::from_utf8(&b).unwrap(),
-            r#"<w:sdt><w:sdtPr><w:rPr /></w:sdtPr><w:sdtContent><w:p w14:paraId="12345678"><w:pPr><w:rPr /><w:framePr w:wrap="none" w:hAnchor="margin" w:vAnchor="text" w:xAlign="left" w:y="1" /></w:pPr><w:r><w:rPr /><w:fldChar w:fldCharType="begin" w:dirty="false" /><w:instrText>PAGE</w:instrText><w:fldChar w:fldCharType="separate" w:dirty="false" /><w:t xml:space="preserve">1</w:t><w:fldChar w:fldCharType="end" w:dirty="false" /></w:r></w:p></w:sdtContent>
+            r#"<w:sdt><w:sdtPr><w:rPr /></w:sdtPr><w:sdtContent><w:p w14:paraId="12345678"><w:pPr><w:rPr /><w:framePr w:wrap="none" w:xAlign="left" /></w:pPr><w:r><w:rPr /><w:fldChar w:fldCharType="begin" w:dirty="false" /><w:instrText>PAGE</w:instrText><w:fldChar w:fldCharType="separate" w:dirty="false" /><w:t xml:space="preserve">1</w:t><w:fldChar w:fldCharType="end" w:dirty="false" /></w:r></w:p></w:sdtContent>
 </w:sdt>"#
         );
     }
diff --git a/docx-core/src/types/alignment_type.rs b/docx-core/src/types/alignment_type.rs
index d050b34..ff80e28 100644
--- a/docx-core/src/types/alignment_type.rs
+++ b/docx-core/src/types/alignment_type.rs
@@ -1,3 +1,4 @@
+use serde::Serialize;
 use std::fmt;
 use std::str::FromStr;
 #[cfg(feature = "wasm")]
@@ -6,7 +7,10 @@ use wasm_bindgen::prelude::*;
 use super::errors;
 
 #[cfg_attr(feature = "wasm", wasm_bindgen)]
-#[derive(Copy, Clone, Debug)]
+#[cfg_attr(feature = "wasm", derive(ts_rs::TS))]
+#[cfg_attr(feature = "wasm", ts(export))]
+#[derive(Copy, Clone, Debug, Serialize)]
+#[serde(rename_all = "camelCase")]
 pub enum AlignmentType {
     Both,
     Center,
@@ -16,7 +20,6 @@ pub enum AlignmentType {
     Left,
     Right,
     Justified,
-    Unsupported,
 }
 
 impl fmt::Display for AlignmentType {
@@ -30,7 +33,6 @@ impl fmt::Display for AlignmentType {
             AlignmentType::End => write!(f, "end"),
             AlignmentType::Both => write!(f, "both"),
             AlignmentType::Justified => write!(f, "justified"),
-            _ => write!(f, "unsupported"),
         }
     }
 }
@@ -47,7 +49,7 @@ impl FromStr for AlignmentType {
             "start" => Ok(AlignmentType::Start),
             "end" => Ok(AlignmentType::End),
             "justified" => Ok(AlignmentType::Justified),
-            _ => Ok(AlignmentType::Unsupported),
+            _ => Ok(AlignmentType::Left),
         }
     }
 }
diff --git a/docx-wasm/js/json/bindings/AlignmentType.ts b/docx-wasm/js/json/bindings/AlignmentType.ts
new file mode 100644
index 0000000..40227c3
--- /dev/null
+++ b/docx-wasm/js/json/bindings/AlignmentType.ts
@@ -0,0 +1,2 @@
+
+export type AlignmentType = "both" | "center" | "distribute" | "start" | "end" | "left" | "right" | "justified";
\ No newline at end of file
diff --git a/docx-wasm/js/json/paragraph.ts b/docx-wasm/js/json/paragraph.ts
index 56457b4..521c5a3 100644
--- a/docx-wasm/js/json/paragraph.ts
+++ b/docx-wasm/js/json/paragraph.ts
@@ -8,6 +8,7 @@ import {
 import { LineSpacingJSON } from "./line_spacing";
 import { FrameProperty as FramePropertyJSON } from "./bindings/FrameProperty";
 import { TextAlignmentType } from "./bindings/TextAlignmentType";
+import { AlignmentType } from "./bindings/AlignmentType";
 
 export { FrameProperty as FramePropertyJSON } from "./bindings/FrameProperty";
 
@@ -56,15 +57,7 @@ export type ParagraphPropertyJSON = {
   runProperty: RunPropertyJSON;
   style?: string | null;
   numberingProperty?: NumberingPropertyJSON | null;
-  alignment?:
-    | "left"
-    | "center"
-    | "right"
-    | "justified"
-    | "both"
-    | "start"
-    | "end"
-    | "unsupported";
+  alignment?: AlignmentType;
   textAlignment?: TextAlignmentType;
   adjustRightInd?: number;
   indent?: IndentJSON | null;
diff --git a/docx-wasm/package.json b/docx-wasm/package.json
index cd38ff4..59c325f 100644
--- a/docx-wasm/package.json
+++ b/docx-wasm/package.json
@@ -1,6 +1,6 @@
 {
   "name": "docx-wasm",
-  "version": "0.4.14-beta2",
+  "version": "0.4.14-beta4",
   "main": "dist/node/index.js",
   "browser": "dist/web/index.js",
   "author": "bokuweb <bokuweb12@gmail.com>",