Bump Krill version.

Change-Id: I8113279365f42700c74eb90164a620e5c92a2cb4
diff --git a/pom.xml b/pom.xml
index 28a6dbb..647a754 100644
--- a/pom.xml
+++ b/pom.xml
@@ -18,7 +18,7 @@
 		<jetty.version>11.0.24</jetty.version>
 		<flyway.version>10.6.0</flyway.version>
 		<log4j.version>2.22.1</log4j.version>
-		<krill.version>[0.63.3,)</krill.version>
+		<krill.version>[0.64,)</krill.version>
 		<koral.version>[0.44,)</koral.version>
 	</properties>
 	<profiles>