diff --git a/chaos-algorithm/pom.xml b/chaos-algorithm/pom.xml
index d758043..f268244 100644
--- a/chaos-algorithm/pom.xml
+++ b/chaos-algorithm/pom.xml
@@ -26,7 +26,7 @@
     <jxr.plugin.version>2.5</jxr.plugin.version>
     <hadrian.version>0.8.5</hadrian.version>
     <junit.version>5.0.0</junit.version>
-    <postgres.version>9.4.1212.jre7</postgres.version>
+    <postgres.version>42.2.26.jre6</postgres.version>
     <mip.adapter.version>0.5.11</mip.adapter.version>
   </properties>