diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f6cc403..86422d2 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -12,7 +12,7 @@ jobs:
           fetch-depth: 1
       - uses: actions/setup-python@v1
         with:
-          python-version: "3.12.9"
+          python-version: "3.12.10"
       - name: install dependencies and test
         run: |
           cd $GITHUB_WORKSPACE
diff --git a/ci/run.py b/ci/run.py
index b385041..0397fdd 100755
--- a/ci/run.py
+++ b/ci/run.py
@@ -54,7 +54,7 @@ def make_build_env():
 
     _env_add('PATH', join(PREFIX, 'bin'))
     if on_github_actions():
-        _env_add('PYTHONPATH', join(os.environ.get('RUNNER_TOOL_CACHE'), 'Python/3.12.9/x64/lib/python3.12/site-packages'))
+        _env_add('PYTHONPATH', join(os.environ.get('RUNNER_TOOL_CACHE'), 'Python/3.12.10/x64/lib/python3.12/site-packages'))
     _env_add('PYTHONPATH', join(PREFIX, 'lib/python3.12/site-packages'))
     _env_add('PKG_CONFIG_PATH', join(PREFIX, 'lib', 'pkgconfig'))
     _env_add('PKG_CONFIG_PATH', join(PREFIX, 'lib64', 'pkgconfig'))
diff --git a/fileserver/fileop.go b/fileserver/fileop.go
index 9e4e163..131f2df 100644
--- a/fileserver/fileop.go
+++ b/fileserver/fileop.go
@@ -932,7 +932,7 @@ func genUniqueFileName(fileName string, fileList []string) string {
 	var uniqueName string
 	var name string
 	i := 1
-	dot := strings.Index(fileName, ".")
+	dot := strings.LastIndex(fileName, ".")
 	if dot < 0 {
 		name = fileName
 	} else {
@@ -2334,7 +2334,7 @@ func genUniqueName(fileName string, entries []*fsmgr.SeafDirent) string {
 	var uniqueName string
 	var name string
 	i := 1
-	dot := strings.Index(fileName, ".")
+	dot := strings.LastIndex(fileName, ".")
 	if dot < 0 {
 		name = fileName
 	} else {