diff --git a/protein-mapping/pom.xml b/protein-mapping/pom.xml
index de68253..9a6b1b3 100644
--- a/protein-mapping/pom.xml
+++ b/protein-mapping/pom.xml
@@ -15,7 +15,7 @@
     <url>http://www.ebi.ac.uk/~intact/devsite/tools/protein-mapping</url>
 
     <properties>
-        <spring.version>4.3.12.RELEASE</spring.version>
+        <spring.version>5.2.21.RELEASE</spring.version>
     </properties>
 
     <build>