diff --git a/CHANGES.txt b/CHANGES.txt
index 6da7d5c7aa..7b792e4668 100644
--- a/CHANGES.txt
+++ b/CHANGES.txt
@@ -1,4 +1,5 @@
 4.1
+ * Exclude Jackson 1.x transitive dependency of hadoop* provided dependencies (CASSANDRA-16854)
  * Add client warnings and abort to tombstone and coordinator reads which go past a low/high watermark (CASSANDRA-16850)
  * Add TTL support to nodetool snapshots (CASSANDRA-16789)
  * Allow CommitLogSegmentReader to optionally skip sync marker CRC checks (CASSANDRA-16842)
diff --git a/build.xml b/build.xml
index 16dd96fe39..3d827ce7dc 100644
--- a/build.xml
+++ b/build.xml
@@ -540,10 +540,12 @@
             <exclusion groupId="org.eclipse.jdt" artifactId="core"/>
             <exclusion groupId="ant" artifactId="ant"/>
             <exclusion groupId="junit" artifactId="junit"/>
+            <exclusion groupId="org.codehaus.jackson" artifactId="jackson-mapper-asl"/>
             <exclusion groupId="org.slf4j" artifactId="slf4j-api"/>
           </dependency>
           <dependency groupId="org.apache.hadoop" artifactId="hadoop-minicluster" version="1.0.3" scope="provided">
             <exclusion groupId="asm" artifactId="asm"/> <!-- this is the outdated version 3.1 -->
+            <exclusion groupId="org.codehaus.jackson" artifactId="jackson-mapper-asl"/>
             <exclusion groupId="org.slf4j" artifactId="slf4j-api"/>
           </dependency>
           <dependency groupId="net.java.dev.jna" artifactId="jna" version="5.6.0"/>
diff --git a/test/unit/org/apache/cassandra/service/snapshot/SnapshotManifestTest.java b/test/unit/org/apache/cassandra/service/snapshot/SnapshotManifestTest.java
index f72d1ec78d..8760270886 100644
--- a/test/unit/org/apache/cassandra/service/snapshot/SnapshotManifestTest.java
+++ b/test/unit/org/apache/cassandra/service/snapshot/SnapshotManifestTest.java
@@ -34,7 +34,7 @@ import static org.assertj.core.api.Assertions.assertThatIOException;
 import static org.assertj.core.api.Assertions.assertThat;
 
 import org.apache.cassandra.config.Duration;
-import org.codehaus.jackson.map.ObjectMapper;
+import com.fasterxml.jackson.databind.ObjectMapper;
 
 public class SnapshotManifestTest
 {