diff --git a/pom.xml b/pom.xml
index 7d4396f3..9584b31b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -154,7 +154,7 @@
     <dependency>
       <groupId>org.apache.commons</groupId>
       <artifactId>commons-lang3</artifactId>
-      <version>3.11</version>
+      <version>3.12.0</version>
     </dependency>
     <dependency>
       <groupId>org.json</groupId>
diff --git a/src/test/groovy/com/frameworkium/core/api/dto/AbstractDTOSpec.groovy b/src/test/groovy/com/frameworkium/core/api/dto/AbstractDTOSpec.groovy
index e0409e7e..65caa769 100644
--- a/src/test/groovy/com/frameworkium/core/api/dto/AbstractDTOSpec.groovy
+++ b/src/test/groovy/com/frameworkium/core/api/dto/AbstractDTOSpec.groovy
@@ -54,7 +54,7 @@ class AbstractDTOSpec extends Specification {
 
     def "toString() creates readable output"() {
         expect:
-            sut.toString() == 'TopLevelDTO[lowLevelDTO=LowLevelDTO[data=initial],stringList={1,a}]'
+            sut.toString() == 'TopLevelDTO[lowLevelDTO=LowLevelDTO[data=initial],stringList=[1, a]]'
     }
 
 }