diff --git a/docx-core/src/documents/elements/page_margin.rs b/docx-core/src/documents/elements/page_margin.rs
index 7a076d8..0f76f2f 100644
--- a/docx-core/src/documents/elements/page_margin.rs
+++ b/docx-core/src/documents/elements/page_margin.rs
@@ -23,31 +23,31 @@ impl PageMargin {
         Default::default()
     }
 
-    pub fn top(self, v: u32) -> PageMargin {
+    pub fn top(self, v: i32) -> PageMargin {
         PageMargin { top: v, ..self }
     }
 
-    pub fn left(self, v: u32) -> PageMargin {
+    pub fn left(self, v: i32) -> PageMargin {
         PageMargin { left: v, ..self }
     }
 
-    pub fn bottom(self, v: u32) -> PageMargin {
+    pub fn bottom(self, v: i32) -> PageMargin {
         PageMargin { bottom: v, ..self }
     }
 
-    pub fn right(self, v: u32) -> PageMargin {
+    pub fn right(self, v: i32) -> PageMargin {
         PageMargin { right: v, ..self }
     }
 
-    pub fn header(self, v: u32) -> PageMargin {
+    pub fn header(self, v: i32) -> PageMargin {
         PageMargin { header: v, ..self }
     }
 
-    pub fn footer(self, v: u32) -> PageMargin {
+    pub fn footer(self, v: i32) -> PageMargin {
         PageMargin { footer: v, ..self }
     }
 
-    pub fn gutter(self, v: u32) -> PageMargin {
+    pub fn gutter(self, v: i32) -> PageMargin {
         PageMargin { gutter: v, ..self }
     }
 }
diff --git a/docx-core/src/reader/section_property.rs b/docx-core/src/reader/section_property.rs
index d910e13..058afd1 100644
--- a/docx-core/src/reader/section_property.rs
+++ b/docx-core/src/reader/section_property.rs
@@ -31,25 +31,25 @@ fn read_page_margin(
         let local_name = &a.name.local_name;
         match local_name.as_str() {
             "top" => {
-                margin = margin.top(value_to_dax(&a.value)? as u32);
+                margin = margin.top(value_to_dax(&a.value)? as i32);
             }
             "right" => {
-                margin = margin.right(value_to_dax(&a.value)? as u32);
+                margin = margin.right(value_to_dax(&a.value)? as i32);
             }
             "bottom" => {
-                margin = margin.bottom(value_to_dax(&a.value)? as u32);
+                margin = margin.bottom(value_to_dax(&a.value)? as i32);
             }
             "left" => {
-                margin = margin.left(value_to_dax(&a.value)? as u32);
+                margin = margin.left(value_to_dax(&a.value)? as i32);
             }
             "header" => {
-                margin = margin.header(value_to_dax(&a.value)? as u32);
+                margin = margin.header(value_to_dax(&a.value)? as i32);
             }
             "footer" => {
-                margin = margin.footer(value_to_dax(&a.value)? as u32);
+                margin = margin.footer(value_to_dax(&a.value)? as i32);
             }
             "gutter" => {
-                margin = margin.gutter(value_to_dax(&a.value)? as u32);
+                margin = margin.gutter(value_to_dax(&a.value)? as i32);
             }
             _ => {}
         }
diff --git a/docx-core/src/types/page_margin.rs b/docx-core/src/types/page_margin.rs
index 6b6c9a4..46d8587 100644
--- a/docx-core/src/types/page_margin.rs
+++ b/docx-core/src/types/page_margin.rs
@@ -3,11 +3,11 @@ use serde::Serialize;
 #[derive(Debug, Clone, PartialEq, Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct PageMargin {
-    pub top: u32,
-    pub left: u32,
-    pub bottom: u32,
-    pub right: u32,
-    pub header: u32,
-    pub footer: u32,
-    pub gutter: u32,
+    pub top: i32,
+    pub left: i32,
+    pub bottom: i32,
+    pub right: i32,
+    pub header: i32,
+    pub footer: i32,
+    pub gutter: i32,
 }
diff --git a/docx-wasm/package.json b/docx-wasm/package.json
index c36940b..3fe2d1c 100644
--- a/docx-wasm/package.json
+++ b/docx-wasm/package.json
@@ -1,6 +1,6 @@
 {
   "name": "docx-wasm",
-  "version": "0.0.254",
+  "version": "0.0.255",
   "main": "dist/node/index.js",
   "browser": "dist/web/index.js",
   "author": "bokuweb <bokuweb12@gmail.com>",
diff --git a/docx-wasm/src/page_margin.rs b/docx-wasm/src/page_margin.rs
index 509ba77..8d469ff 100644
--- a/docx-wasm/src/page_margin.rs
+++ b/docx-wasm/src/page_margin.rs
@@ -17,40 +17,40 @@ impl PageMargin {
 
 #[wasm_bindgen]
 impl PageMargin {
-    pub fn top(self, v: u32) -> PageMargin {
+    pub fn top(self, v: i32) -> PageMargin {
         PageMargin(docx_rs::PageMargin { top: v, ..self.0 })
     }
 
-    pub fn left(self, v: u32) -> PageMargin {
+    pub fn left(self, v: i32) -> PageMargin {
         PageMargin(docx_rs::PageMargin { left: v, ..self.0 })
     }
 
-    pub fn bottom(self, v: u32) -> PageMargin {
+    pub fn bottom(self, v: i32) -> PageMargin {
         PageMargin(docx_rs::PageMargin {
             bottom: v,
             ..self.0
         })
     }
 
-    pub fn right(self, v: u32) -> PageMargin {
+    pub fn right(self, v: i32) -> PageMargin {
         PageMargin(docx_rs::PageMargin { right: v, ..self.0 })
     }
 
-    pub fn header(self, v: u32) -> PageMargin {
+    pub fn header(self, v: i32) -> PageMargin {
         PageMargin(docx_rs::PageMargin {
             header: v,
             ..self.0
         })
     }
 
-    pub fn footer(self, v: u32) -> PageMargin {
+    pub fn footer(self, v: i32) -> PageMargin {
         PageMargin(docx_rs::PageMargin {
             footer: v,
             ..self.0
         })
     }
 
-    pub fn gutter(self, v: u32) -> PageMargin {
+    pub fn gutter(self, v: i32) -> PageMargin {
         PageMargin(docx_rs::PageMargin {
             gutter: v,
             ..self.0