diff --git a/testing/spark3-iceberg/Dockerfile b/testing/spark3-iceberg/Dockerfile
index 67bdfffd..c8e1ad41 100644
--- a/testing/spark3-iceberg/Dockerfile
+++ b/testing/spark3-iceberg/Dockerfile
@@ -13,11 +13,11 @@
 ARG ARCH
 FROM testing/centos7-oj11:unlabelled$ARCH
 
-ARG SPARK_VERSION=3.5.0
+ARG SPARK_VERSION=3.4.2
 ARG HADOOP_VERSION=3
-ARG ICEBERG_VERSION=1.4.1
+ARG ICEBERG_VERSION=1.4.2
 # ICEBERG_JAR_VERSION is derived from: <spark-version>_<scala-version>
-ARG ICEBERG_JAR_VERSION=3.5_2.12
+ARG ICEBERG_JAR_VERSION=3.4_2.12
 ARG POSTGRESQL_JAR_VERSION=42.3.5
 
 ARG SPARK_ARTIFACT="spark-${SPARK_VERSION}-bin-hadoop${HADOOP_VERSION}"