diff --git a/CHANGES.txt b/CHANGES.txt
index 3405820d6a..9df8490860 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -8,6 +8,7 @@ Merged from 4.0:
  * Fix Down nodes counter in nodetool describecluster (CASSANDRA-18512)
  * Remove unnecessary shuffling of GossipDigests in Gossiper#makeRandomGossipDigest (CASSANDRA-18546)
 Merged from 3.11:
+ * Moved jflex from runtime to build dependencies (CASSANDRA-18664)
  * Fix CAST function for float to decimal (CASSANDRA-18647)
  * Suppress CVE-2022-45688 (CASSANDRA-18643)
  * Remove unrepaired SSTables from garbage collection when only_purge_repaired_tombstones is true (CASSANDRA-14204)
diff --git a/build.xml b/build.xml
index 09d4255d89..b0bc54f804 100644
--- a/build.xml
+++ b/build.xml
@@ -876,7 +876,6 @@
         <dependency groupId="org.hdrhistogram" artifactId="HdrHistogram"/>
 
         <!-- sasi deps -->
-        <dependency groupId="de.jflex" artifactId="jflex" />
         <dependency groupId="com.github.rholder" artifactId="snowball-stemmer" />
         <dependency groupId="com.googlecode.concurrent-trees" artifactId="concurrent-trees" />