diff --git a/pom.xml b/pom.xml
index 1ed0de8..cac335e 100644
--- a/pom.xml
+++ b/pom.xml
@@ -33,7 +33,7 @@
         <junit-version>4.12</junit-version>
         <servlet-api-version>2.5</servlet-api-version>
         <jackson-version>2.11.2</jackson-version>
-        <spring-version>3.4.2</spring-version>
+        <spring-version>3.5.9</spring-version>
         <javax-annotation-api-version>1.3.2</javax-annotation-api-version>
         <jaxb-version>2.3.1</jaxb-version>
         <openapi.generator-version>7.11.0</openapi.generator-version>