diff --git a/gradle.properties b/gradle.properties
index 7810e99..1d3f3e9 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -3,7 +3,7 @@ dockerPluginVersion=5.4.0
 
 junitJupiterVersion=5.4.2
 mockitoVersion=2.27.0
-solrVersion=6.6.5
+solrVersion=9.6.0
 assVersion=2.0.8.2
 amazonVersion=1.12.32
 jaxBVersion=2.3.2