diff --git a/pom.xml b/pom.xml
index 5c19f30f..1a6d761b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -10,7 +10,7 @@
         <version.junit5>5.10.3</version.junit5>
         <version.okhttp>4.12.0</version.okhttp>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <version.unleash.specification>5.1.9</version.unleash.specification>
+        <version.unleash.specification>5.1.8</version.unleash.specification>
         <arguments />
         <version.jackson>2.17.2</version.jackson>
         <version.logback>1.3.14</version.logback>