diff --git a/pom.xml b/pom.xml
old mode 100755
new mode 100644
index 2bedd96..c50f18e
--- a/pom.xml
+++ b/pom.xml
@@ -26,7 +26,7 @@
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <java.version>1.8</java.version>
-        <spring-version>4.3.5.RELEASE</spring-version>
+        <spring-version>5.2.1.RELEASE</spring-version>
         <logback.version>1.2.3</logback.version>
         <slf4j.version>1.7.22</slf4j.version>
         <tenancy-api.version>1.0-SNAPSHOT</tenancy-api.version>