diff --git a/optaplanner-quickstarts/spring-boot-school-timetabling/pom.xml b/optaplanner-quickstarts/spring-boot-school-timetabling/pom.xml
index 9f60004003..f85f3a6b8e 100644
--- a/optaplanner-quickstarts/spring-boot-school-timetabling/pom.xml
+++ b/optaplanner-quickstarts/spring-boot-school-timetabling/pom.xml
@@ -11,7 +11,7 @@
 
   <properties>
     <version.org.optaplanner>7.67.1-SNAPSHOT</version.org.optaplanner>
-    <version.org.yaml.snakeyaml>2.0</version.org.yaml.snakeyaml>
+    <version.org.yaml.snakeyaml>2.4</version.org.yaml.snakeyaml>
     <version.org.springframework.boot>2.5.15</version.org.springframework.boot>
     <version.org.webjars.webjars-locator>0.37</version.org.webjars.webjars-locator>
     <version.org.webjars.bootstrap>4.3.1</version.org.webjars.bootstrap>