diff --git a/pom.xml b/pom.xml
index c50bd36a..db0ca611 100644
--- a/pom.xml
+++ b/pom.xml
@@ -49,7 +49,7 @@
   </developers>
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <solr.version>7.7.3</solr.version>
+    <solr.version>9.0.0</solr.version>
     <slf4j.version>2.0.12</slf4j.version>
     <log4j.version>2.23.0</log4j.version>
     <restlet.version>2.4.3</restlet.version>
@@ -134,7 +134,7 @@
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java</artifactId>
-      <version>3.21.7</version>
+      <version>3.25.5</version>
       <scope>runtime</scope>
     </dependency>
     <!-- UTILITY AND LOGGING -->