diff --git a/regtests/run.sh b/regtests/run.sh
index 6b44983ec..2fad67df1 100755
--- a/regtests/run.sh
+++ b/regtests/run.sh
@@ -19,7 +19,7 @@
 #
 # Run without args to run all tests, or single arg for single test.
 
-export SPARK_VERSION=spark-3.5.2
+export SPARK_VERSION=spark-3.5.3
 export SPARK_DISTRIBUTION=${SPARK_VERSION}-bin-hadoop3
 
 if [ -z "${SPARK_HOME}"]; then
diff --git a/regtests/run_spark_sql.sh b/regtests/run_spark_sql.sh
index 9e1a53e26..cc355095e 100755
--- a/regtests/run_spark_sql.sh
+++ b/regtests/run_spark_sql.sh
@@ -46,7 +46,7 @@ fi
 REGTEST_HOME=$(dirname $(realpath $0))
 cd ${REGTEST_HOME}
 
-export SPARK_VERSION=spark-3.5.2
+export SPARK_VERSION=spark-3.5.3
 export SPARK_DISTRIBUTION=${SPARK_VERSION}-bin-hadoop3
 
 ./setup.sh