diff --git a/pom.xml b/pom.xml
index 4326c26..f7aa6cd 100644
--- a/pom.xml
+++ b/pom.xml
@@ -27,7 +27,7 @@ SOFTWARE
   <parent>
     <groupId>com.jcabi</groupId>
     <artifactId>parent</artifactId>
-    <version>0.64.1</version>
+    <version>0.66.0</version>
   </parent>
   <groupId>org.eolang</groupId>
   <artifactId>eo-math</artifactId>