diff --git a/CHANGELOG.md b/CHANGELOG.md
index 661589d..30864d9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,12 @@ The envelope wire format is versioned separately by `meta.schema_version`
 
 ## [Unreleased]
 
+## [1.4.1] - 2026-10-26
+
+### Changed
+
+- The poison DLQ block is built by `babelqueue-core` 1.14.0; no wire change. Requires `babelqueue-core` 1.14.0 (was 1.13.0).
+
 ## [1.4.0] - 2026-10-26
 
 MINOR (ADR-0037): the consumer gains an opt-in BabelQueue DLQ and settles poison bodies and version-gated
diff --git a/pom.xml b/pom.xml
index b87c0af..44e9bea 100644
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 
     <groupId>com.babelqueue</groupId>
     <artifactId>babelqueue-sqs</artifactId>
-    <version>1.4.0</version>
+    <version>1.4.1</version>
     <packaging>jar</packaging>
 
     <name>BabelQueue Amazon SQS</name>
@@ -49,7 +49,7 @@
         <maven.compiler.release>17</maven.compiler.release>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-        <babelqueue-core.version>1.13.0</babelqueue-core.version>
+        <babelqueue-core.version>1.14.0</babelqueue-core.version>
         <aws-sdk.version>2.25.0</aws-sdk.version>
         <opentelemetry.version>1.45.0</opentelemetry.version>
         <junit.version>6.1.3</junit.version>
diff --git a/src/main/java/com/babelqueue/sqs/SqsConsumer.java b/src/main/java/com/babelqueue/sqs/SqsConsumer.java
index 9a821b8..d6bb360 100644
--- a/src/main/java/com/babelqueue/sqs/SqsConsumer.java
+++ b/src/main/java/com/babelqueue/sqs/SqsConsumer.java
@@ -4,7 +4,6 @@
 import com.babelqueue.DeadLetters;
 import com.babelqueue.Envelope;
 import com.babelqueue.EnvelopeCodec;
-import com.babelqueue.JsonValues;
 import com.babelqueue.PoisonRecord;
 import com.babelqueue.UnknownUrnException;
 import com.babelqueue.UnknownUrnStrategy;
@@ -13,7 +12,6 @@
 import java.security.NoSuchAlgorithmException;
 import java.util.HashMap;
 import java.util.HexFormat;
-import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Objects;
@@ -272,15 +270,7 @@ record = poisonRecord(body.getBytes(StandardCharsets.UTF_8), SqsQueues.nameFromU
      * {@code poison_dlq} drives it directly for bodies SQS itself cannot carry, such as invalid UTF-8).
      */
     static String poisonRecord(byte[] body, String originalQueue, int attempts, Throwable cause) {
-        Map<String, Object> block = new LinkedHashMap<>();
-        block.put("reason", "poison");
-        block.put("error", cause.getMessage());
-        block.put("exception", cause.getClass().getName());
-        block.put("failed_at", System.currentTimeMillis());
-        block.put("original_queue", originalQueue);
-        block.put("attempts", attempts);
-        block.put("lang", EnvelopeCodec.SOURCE_LANG);
-        return PoisonRecord.build(body, JsonValues.encode(block));
+        return PoisonRecord.build(body, originalQueue, attempts, cause.getMessage(), cause.getClass().getName());
     }
 
     /** {@code ApproximateReceiveCount - 1} (informational {@code dead_letter.attempts}), never negative. */