diff --git a/sample-tracking-api/requirements.txt b/sample-tracking-api/requirements.txt
old mode 100755
new mode 100644
index f7b0503..2957c4e
--- a/sample-tracking-api/requirements.txt
+++ b/sample-tracking-api/requirements.txt
@@ -36,7 +36,7 @@ PyJWT==1.7.1
 PyMySQL==0.9.3
 python-dateutil==2.8.0
 python-editor==1.0.4
-python-ldap==3.3.1
+python-ldap==3.4.0
 pytz==2020.1
 PyYAML==5.3.1
 requests==2.24.0