diff --git a/Cargo.toml b/Cargo.toml
index ca53992..3247c21 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "updateinfo-xmlparser"
-version = "0.1.1"
+version = "0.1.2"
 edition = "2021"
 
 [dependencies]
diff --git a/src/lib.rs b/src/lib.rs
index 041a7f4..df73064 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -181,7 +181,7 @@ pub struct RpmInfo {
     // 包名
     name: String,
     // 可能为空
-    epoch: String,
+    epoch: Option<i32>,
 
     version: String,
 
@@ -198,7 +198,7 @@ impl RpmInfo {
     pub fn new() -> Self {
         RpmInfo {
             name: String::new(),
-            epoch: String::new(),
+            epoch: None,
             version: String::new(),
             release: String::new(),
             arch: String::new(),
@@ -211,7 +211,12 @@ impl RpmInfo {
     pub fn set(&mut self, key: &str, value: String) {
         match key {
             "name" => self.name = value,
-            "epoch" => self.epoch = value,
+            "epoch" => {
+                self.epoch = match value.parse::<i32>() {
+                    Ok(i) => Some(i),
+                    Err(_) => None,
+                }; 
+            },
             "version" => self.version = value,
             "release" => self.release = value,
             "arch" => self.arch = value,
@@ -225,12 +230,15 @@ impl RpmInfo {
         &self.name
     }
 
-    pub fn epoch(&self) -> Option<&str> {
+    pub fn epoch(&self) -> Option<i32> {
+        /*
         if self.epoch != "" {
             Some(&self.epoch)
         } else {
             None
         }
+        */
+        self.epoch
     }
 
     pub fn version(&self) -> &str {
@@ -241,8 +249,12 @@ impl RpmInfo {
         &self.release
     }
 
-    pub fn arch(&self) -> &str {
-        &self.arch
+    pub fn arch(&self) -> Option<&str> {
+        if self.arch != "" {
+            Some(&self.arch)
+        } else {
+            None
+        }
     }
 
     pub fn file(&self) -> &str {
@@ -255,7 +267,7 @@ impl RpmInfo {
 
     pub fn evr(&self) -> String {
         if self.epoch().is_some() {
-            format!("{}:{}-{}", self.epoch, self.version, self.release)
+            format!("{}:{}-{}", self.epoch.as_ref().unwrap(), self.version, self.release)
         } else {
             format!("{}-{}", self.version, self.release)
         }