diff --git a/pom.xml b/pom.xml
index 1aa3d8e..79fdc7b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -71,7 +71,7 @@
       <dependency>
         <groupId>org.apache.solr</groupId>
         <artifactId>solr-core</artifactId>
-        <version>5.5.2</version>
+        <version>8.4.0</version>
       </dependency>
       <!-- protobuf -->
       <dependency>