diff --git a/YTKNetwork.podspec b/YTKNetwork.podspec
index 4655d4f..b233b76 100644
--- a/YTKNetwork.podspec
+++ b/YTKNetwork.podspec
@@ -1,7 +1,7 @@
 Pod::Spec.new do |s|
 
   s.name         = "YTKNetwork"
-  s.version      = "2.0.4"
+  s.version      = "2.0.5"
   s.summary      = "YTKNetwork is a high level request util based on AFNetworking."
   s.homepage     = "https://github.com/yuantiku/YTKNetwork"
   s.license      = "MIT"
diff --git a/YTKNetwork/YTKNetworkAgent.m b/YTKNetwork/YTKNetworkAgent.m
index 5703013..72ffff9 100644
--- a/YTKNetwork/YTKNetworkAgent.m
+++ b/YTKNetwork/YTKNetworkAgent.m
@@ -241,7 +241,7 @@ - (void)addRequest:(YTKBaseRequest *)request {
 - (void)cancelRequest:(YTKBaseRequest *)request {
     NSParameterAssert(request != nil);
 
-    if (request.resumableDownloadPath) {
+    if (request.resumableDownloadPath && [self incompleteDownloadTempPathForDownloadPath:request.resumableDownloadPath] != nil) {
         NSURLSessionDownloadTask *requestTask = (NSURLSessionDownloadTask *)request.requestTask;
         [requestTask cancelByProducingResumeData:^(NSData *resumeData) {
             NSURL *localUrl = [self incompleteDownloadTempPathForDownloadPath:request.resumableDownloadPath];
@@ -382,8 +382,9 @@ - (void)requestDidFailWithRequest:(YTKBaseRequest *)request error:(NSError *)err
 
     // Save incomplete download data.
     NSData *incompleteDownloadData = error.userInfo[NSURLSessionDownloadTaskResumeData];
-    if (incompleteDownloadData) {
-        [incompleteDownloadData writeToURL:[self incompleteDownloadTempPathForDownloadPath:request.resumableDownloadPath] atomically:YES];
+    NSURL *localUrl = [self incompleteDownloadTempPathForDownloadPath:request.resumableDownloadPath];
+    if (incompleteDownloadData && localUrl != nil) {
+        [incompleteDownloadData writeToURL:localUrl atomically:YES];
     }
 
     // Load response from file and clean up if download task failed.
@@ -492,27 +493,30 @@ - (NSURLSessionDownloadTask *)downloadTaskWithDownloadPath:(NSString *)downloadP
         [[NSFileManager defaultManager] removeItemAtPath:downloadTargetPath error:nil];
     }
 
-    BOOL resumeDataFileExists = [[NSFileManager defaultManager] fileExistsAtPath:[self incompleteDownloadTempPathForDownloadPath:downloadPath].path];
-    NSData *data = [NSData dataWithContentsOfURL:[self incompleteDownloadTempPathForDownloadPath:downloadPath]];
-    BOOL resumeDataIsValid = [YTKNetworkUtils validateResumeData:data];
-
-    BOOL canBeResumed = resumeDataFileExists && resumeDataIsValid;
     BOOL resumeSucceeded = NO;
     __block NSURLSessionDownloadTask *downloadTask = nil;
-    // Try to resume with resumeData.
-    // Even though we try to validate the resumeData, this may still fail and raise excecption.
-    if (canBeResumed) {
-        @try {
-            downloadTask = [_manager downloadTaskWithResumeData:data progress:downloadProgressBlock destination:^NSURL * _Nonnull(NSURL * _Nonnull targetPath, NSURLResponse * _Nonnull response) {
-                return [NSURL fileURLWithPath:downloadTargetPath isDirectory:NO];
-            } completionHandler:
-                            ^(NSURLResponse * _Nonnull response, NSURL * _Nullable filePath, NSError * _Nullable error) {
-                                [self handleRequestResult:downloadTask responseObject:filePath error:error];
-                            }];
-            resumeSucceeded = YES;
-        } @catch (NSException *exception) {
-            YTKLog(@"Resume download failed, reason = %@", exception.reason);
-            resumeSucceeded = NO;
+    NSURL *localUrl = [self incompleteDownloadTempPathForDownloadPath:downloadPath];
+    if (localUrl != nil) {
+        BOOL resumeDataFileExists = [[NSFileManager defaultManager] fileExistsAtPath:localUrl.path];
+        NSData *data = [NSData dataWithContentsOfURL:localUrl];
+        BOOL resumeDataIsValid = [YTKNetworkUtils validateResumeData:data];
+
+        BOOL canBeResumed = resumeDataFileExists && resumeDataIsValid;
+        // Try to resume with resumeData.
+        // Even though we try to validate the resumeData, this may still fail and raise excecption.
+        if (canBeResumed) {
+            @try {
+                downloadTask = [_manager downloadTaskWithResumeData:data progress:downloadProgressBlock destination:^NSURL * _Nonnull(NSURL * _Nonnull targetPath, NSURLResponse * _Nonnull response) {
+                    return [NSURL fileURLWithPath:downloadTargetPath isDirectory:NO];
+                } completionHandler:
+                                ^(NSURLResponse * _Nonnull response, NSURL * _Nullable filePath, NSError * _Nullable error) {
+                                    [self handleRequestResult:downloadTask responseObject:filePath error:error];
+                                }];
+                resumeSucceeded = YES;
+            } @catch (NSException *exception) {
+                YTKLog(@"Resume download failed, reason = %@", exception.reason);
+                resumeSucceeded = NO;
+            }
         }
     }
     if (!resumeSucceeded) {
@@ -549,7 +553,7 @@ - (NSURL *)incompleteDownloadTempPathForDownloadPath:(NSString *)downloadPath {
     NSString *tempPath = nil;
     NSString *md5URLString = [YTKNetworkUtils md5StringFromString:downloadPath];
     tempPath = [[self incompleteDownloadTempCacheFolder] stringByAppendingPathComponent:md5URLString];
-    return [NSURL fileURLWithPath:tempPath];
+    return tempPath == nil ? nil : [NSURL fileURLWithPath:tempPath];
 }
 
 #pragma mark - Testing