diff --git a/src/main/java/run/halo/app/controller/admin/api/ThemeController.java b/src/main/java/run/halo/app/controller/admin/api/ThemeController.java
index 5955ee053..31688b433 100644
--- a/src/main/java/run/halo/app/controller/admin/api/ThemeController.java
+++ b/src/main/java/run/halo/app/controller/admin/api/ThemeController.java
@@ -117,13 +117,6 @@ public class ThemeController {
         themeSettingService.save(settings, themeId);
     }
 
-    @PutMapping("{themeId}")
-    public ThemeProperty updateTheme(@PathVariable("themeId") String themeId,
-                                     @RequestPart(name = "file", required = false) MultipartFile file) {
-
-        return themeService.update(themeId);
-    }
-
     @DeleteMapping("{themeId}")
     @ApiOperation("Deletes a theme")
     public void deleteBy(@PathVariable("themeId") String themeId) {
@@ -136,12 +129,25 @@ public class ThemeController {
         return themeService.upload(file);
     }
 
+    @PutMapping("upload/{themeId}")
+    public ThemeProperty updateThemeByUpload(@PathVariable("themeId") String themeId,
+                                             @RequestPart("file") MultipartFile file) {
+        return themeService.update(themeId, file);
+    }
+
     @PostMapping("fetching")
     @ApiOperation("Fetches a new theme")
     public ThemeProperty fetchTheme(@RequestParam("uri") String uri) {
         return themeService.fetch(uri);
     }
 
+    @PutMapping("fetching/{themeId}")
+    public ThemeProperty updateThemeByFetching(@PathVariable("themeId") String themeId,
+                                               @RequestPart(name = "file", required = false) MultipartFile file) {
+
+        return themeService.update(themeId);
+    }
+
     @PostMapping("reload")
     @ApiOperation("Reloads themes")
     public void reload() {
diff --git a/src/main/java/run/halo/app/service/ThemeService.java b/src/main/java/run/halo/app/service/ThemeService.java
index 6ad65d68d..df100e6e6 100644
--- a/src/main/java/run/halo/app/service/ThemeService.java
+++ b/src/main/java/run/halo/app/service/ThemeService.java
@@ -24,6 +24,7 @@ public interface ThemeService {
     /**
      * Theme property file name.
      */
+    @Deprecated
     String THEME_PROPERTY_FILE_NAME = "theme.yaml";
 
     /**
@@ -236,6 +237,7 @@ public interface ThemeService {
      *
      * @param themeTmpPath theme temporary path must not be null
      * @return theme property
+     * @throws IOException IOException
      */
     @NonNull
     ThemeProperty add(@NonNull Path themeTmpPath) throws IOException;
@@ -262,4 +264,13 @@ public interface ThemeService {
      */
     @NonNull
     ThemeProperty update(@NonNull String themeId);
+
+    /**
+     * Updates theme by theme id.
+     *
+     * @param themeId theme id must not be blank
+     * @param file    multipart file must not be null
+     * @return theme info
+     */
+    ThemeProperty update(@NonNull String themeId, @NonNull MultipartFile file);
 }
diff --git a/src/main/java/run/halo/app/service/impl/ThemeServiceImpl.java b/src/main/java/run/halo/app/service/impl/ThemeServiceImpl.java
index 9c61f8ab5..bdc0d1a60 100644
--- a/src/main/java/run/halo/app/service/impl/ThemeServiceImpl.java
+++ b/src/main/java/run/halo/app/service/impl/ThemeServiceImpl.java
@@ -105,7 +105,7 @@ public class ThemeServiceImpl implements ThemeService {
 
     @Override
     public ThemeProperty getThemeOfNonNullBy(String themeId) {
-        return getThemeBy(themeId).orElseThrow(() -> new NotFoundException("Theme with id: " + themeId + " was not found").setErrorData(themeId));
+        return getThemeBy(themeId).orElseThrow(() -> new NotFoundException("没有找到 id 为 " + themeId + " 的主题").setErrorData(themeId));
     }
 
     @Override
@@ -487,6 +487,59 @@ public class ThemeServiceImpl implements ThemeService {
         return getThemeOfNonNullBy(themeId);
     }
 
+    @Override
+    public ThemeProperty update(String themeId, MultipartFile file) {
+        Assert.hasText(themeId, "Theme id must not be blank");
+        Assert.notNull(themeId, "Theme file must not be blank");
+
+        if (!StringUtils.endsWithIgnoreCase(file.getOriginalFilename(), ".zip")) {
+            throw new UnsupportedMediaTypeException("不支持的文件类型: " + file.getContentType()).setErrorData(file.getOriginalFilename());
+        }
+
+        ThemeProperty updatingTheme = getThemeOfNonNullBy(themeId);
+
+        ZipInputStream zis = null;
+        Path tempPath = null;
+
+        try {
+            // Create temp directory
+            tempPath = FileUtils.createTempDirectory();
+
+            String basename = FilenameUtils.getBasename(file.getOriginalFilename());
+            Path themeTempPath = tempPath.resolve(basename);
+
+            // Check directory traversal
+            FileUtils.checkDirectoryTraversal(tempPath, themeTempPath);
+
+            // New zip input stream
+            zis = new ZipInputStream(file.getInputStream());
+
+            // Unzip to temp path
+            FileUtils.unzip(zis, themeTempPath);
+
+            Path preparePath = FileUtils.tryToSkipZipParentFolder(themeTempPath);
+
+            ThemeProperty prepareThemeProperty = getProperty(preparePath);
+
+            if (!prepareThemeProperty.getId().equals(updatingTheme.getId())) {
+                throw new ServiceException("上传的主题包不是该主题的更新包: " + file.getOriginalFilename());
+            }
+
+            // Coping new theme files to old theme folder.
+            FileUtils.copyFolder(preparePath, Paths.get(updatingTheme.getThemePath()));
+
+            // Gets theme property again.
+            return getProperty(Paths.get(updatingTheme.getThemePath()));
+        } catch (IOException e) {
+            throw new ServiceException("更新主题失败: " + file.getOriginalFilename(), e);
+        } finally {
+            // Close zip input stream
+            FileUtils.closeQuietly(zis);
+            // Delete folder after testing
+            FileUtils.deleteFolderQuietly(tempPath);
+        }
+    }
+
     private void pullFromGit(@NonNull ThemeProperty themeProperty) throws IOException, GitAPIException, URISyntaxException {
         Assert.notNull(themeProperty, "Theme property must not be null");
 
@@ -735,7 +788,7 @@ public class ThemeServiceImpl implements ThemeService {
      */
     @NonNull
     private ThemeProperty getProperty(@NonNull Path themePath) {
-        return getPropertyOfNullable(themePath).orElseThrow(() -> new ThemePropertyMissingException("该主题没有说明文件").setErrorData(themePath));
+        return getPropertyOfNullable(themePath).orElseThrow(() -> new ThemePropertyMissingException(themePath + " 没有说明文件").setErrorData(themePath));
     }
 
     /**