diff --git a/.travis.yml b/.travis.yml
index 73d5b5e48..5f887dab4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -15,7 +15,7 @@ jobs:
     - stage: test
       script: ./gradlew check
     - stage: build
-      script: ./gradlew build -x test
+      script: ./gradlew clean build -x test
     - stage: Build Docker Image for Release
       script: ./scripts/docker-build-release.sh
     - stage: Build Docker Image for Dev
@@ -33,7 +33,8 @@ jobs:
 stages:
   - test
   - build
-  - GitHub Release
+  - name: GitHub Release
+    if: tag =~ /^v\d+\.\d+(\.\d+)?(-\S*)?$/
   - name: Build Docker Image for Release
     if: tag =~ /^v\d+\.\d+(\.\d+)?(-release)?$/
   - name: Build Docker Image for Dev
diff --git a/src/main/java/run/halo/app/handler/file/FileHandler.java b/src/main/java/run/halo/app/handler/file/FileHandler.java
index ab4cf7fbf..1de46ee93 100644
--- a/src/main/java/run/halo/app/handler/file/FileHandler.java
+++ b/src/main/java/run/halo/app/handler/file/FileHandler.java
@@ -1,16 +1,16 @@
 package run.halo.app.handler.file;
 
-import run.halo.app.exception.FileOperationException;
-import run.halo.app.model.enums.AttachmentType;
-import run.halo.app.model.support.UploadResult;
 import org.apache.commons.lang3.StringUtils;
 import org.springframework.http.MediaType;
 import org.springframework.lang.NonNull;
 import org.springframework.lang.Nullable;
 import org.springframework.util.Assert;
 import org.springframework.web.multipart.MultipartFile;
+import run.halo.app.exception.FileOperationException;
+import run.halo.app.model.enums.AttachmentType;
+import run.halo.app.model.support.UploadResult;
 
-import java.io.File;
+import static run.halo.app.model.support.HaloConst.FILE_SEPARATOR;
 
 /**
  * File handler interface.
@@ -80,6 +80,6 @@ public interface FileHandler {
     static String normalizeDirectory(@NonNull String dir) {
         Assert.hasText(dir, "Directory full name must not be blank");
 
-        return StringUtils.appendIfMissing(dir, File.separator);
+        return StringUtils.appendIfMissing(dir, FILE_SEPARATOR);
     }
 }
diff --git a/src/main/java/run/halo/app/handler/file/LocalFileHandler.java b/src/main/java/run/halo/app/handler/file/LocalFileHandler.java
index 64acef93b..4c626e5a8 100644
--- a/src/main/java/run/halo/app/handler/file/LocalFileHandler.java
+++ b/src/main/java/run/halo/app/handler/file/LocalFileHandler.java
@@ -18,15 +18,15 @@ import org.springframework.web.multipart.MultipartFile;
 
 import javax.imageio.ImageIO;
 import java.awt.image.BufferedImage;
-import java.io.File;
 import java.io.IOException;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
 import java.util.Calendar;
-import java.util.Locale;
 import java.util.Objects;
 
+import static run.halo.app.model.support.HaloConst.FILE_SEPARATOR;
+
 /**
  * Local file handler.
  *
@@ -97,7 +97,7 @@ public class LocalFileHandler implements FileHandler {
         int month = current.get(Calendar.MONTH) + 1;
 
         // Build directory
-        String subDir = UPLOAD_SUB_DIR + year + File.separator + month + File.separator;
+        String subDir = UPLOAD_SUB_DIR + year + FILE_SEPARATOR + month + FILE_SEPARATOR;
 
         String originalBasename = FilenameUtils.getBasename(file.getOriginalFilename());
 
diff --git a/src/main/java/run/halo/app/model/support/HaloConst.java b/src/main/java/run/halo/app/model/support/HaloConst.java
index 922aeb6d1..49be00fa6 100644
--- a/src/main/java/run/halo/app/model/support/HaloConst.java
+++ b/src/main/java/run/halo/app/model/support/HaloConst.java
@@ -1,5 +1,7 @@
 package run.halo.app.model.support;
 
+import java.io.File;
+
 /**
  * <pre>
  *     公共常量
@@ -25,6 +27,11 @@ public class HaloConst {
      */
     public static final String HALO_VERSION;
 
+    /**
+     * Path separator.
+     */
+    public static final String FILE_SEPARATOR = File.separator;
+
     /**
      * Suffix of freemarker template file
      */
diff --git a/src/main/java/run/halo/app/service/impl/AttachmentServiceImpl.java b/src/main/java/run/halo/app/service/impl/AttachmentServiceImpl.java
index f778a5c9e..9aeef3fa0 100644
--- a/src/main/java/run/halo/app/service/impl/AttachmentServiceImpl.java
+++ b/src/main/java/run/halo/app/service/impl/AttachmentServiceImpl.java
@@ -21,6 +21,7 @@ import run.halo.app.repository.AttachmentRepository;
 import run.halo.app.service.AttachmentService;
 import run.halo.app.service.OptionService;
 import run.halo.app.service.base.AbstractCrudService;
+import run.halo.app.utils.HaloUtils;
 
 import javax.persistence.criteria.Predicate;
 import java.util.LinkedList;
@@ -108,7 +109,8 @@ public class AttachmentServiceImpl extends AbstractCrudService<Attachment, Integ
         // Build attachment
         Attachment attachment = new Attachment();
         attachment.setName(uploadResult.getFilename());
-        attachment.setPath(uploadResult.getFilePath());
+        // Convert separator
+        attachment.setPath(HaloUtils.changeFileSeparatorToUrlSeparator(uploadResult.getFilePath()));
         attachment.setFileKey(uploadResult.getKey());
         attachment.setThumbPath(uploadResult.getThumbPath());
         attachment.setMediaType(uploadResult.getMediaType().toString());
diff --git a/src/main/java/run/halo/app/utils/HaloUtils.java b/src/main/java/run/halo/app/utils/HaloUtils.java
index 857f05b3d..21e0e41a4 100755
--- a/src/main/java/run/halo/app/utils/HaloUtils.java
+++ b/src/main/java/run/halo/app/utils/HaloUtils.java
@@ -20,6 +20,8 @@ import java.nio.file.attribute.BasicFileAttributes;
 import java.util.Date;
 import java.util.UUID;
 
+import static run.halo.app.model.support.HaloConst.FILE_SEPARATOR;
+
 /**
  * <pre>
  * 常用工具
@@ -31,6 +33,18 @@ import java.util.UUID;
 @Slf4j
 public class HaloUtils {
 
+    /**
+     * Changes file separator to url separator.
+     *
+     * @param pathname full path name must not be blank.
+     * @return text with url separator
+     */
+    public static String changeFileSeparatorToUrlSeparator(@NonNull String pathname) {
+        Assert.hasText(pathname, "Path name must not be blank");
+
+        return pathname.replace(FILE_SEPARATOR, "/");
+    }
+
     /**
      * Time format.
      *