diff --git a/.circleci/defaults.sh b/.circleci/defaults.sh
index 02558101..015aaee7 100755
--- a/.circleci/defaults.sh
+++ b/.circleci/defaults.sh
@@ -33,7 +33,7 @@ REMOTE_ESP_DIR=$REMOTE_WORK_DIR/esp-tools-install
 REMOTE_CHIPYARD_DIR=$REMOTE_WORK_DIR/chipyard
 REMOTE_SIM_DIR=$REMOTE_CHIPYARD_DIR/sims/verilator
 REMOTE_FIRESIM_DIR=$REMOTE_CHIPYARD_DIR/sims/firesim/sim
-REMOTE_JAVA_OPTS="-Xmx9G -Xss8M"
+REMOTE_JAVA_OPTS="-Xmx10G -Xss8M"
 # Disable the supershell to greatly improve the readability of SBT output when captured by Circle CI
 REMOTE_SBT_ARGS="-Dsbt.ivy.home=$REMOTE_WORK_DIR/.ivy2 -Dsbt.supershell=false -Dsbt.global.base=$REMOTE_WORK_DIR/.sbt -Dsbt.boot.directory=$REMOTE_WORK_DIR/.sbt/boot"
 REMOTE_VERILATOR_DIR=$REMOTE_PREFIX-$CIRCLE_SHA1-verilator-install
diff --git a/sims/firesim b/sims/firesim
index 593596c5..f9ca2f49 160000
--- a/sims/firesim
+++ b/sims/firesim
@@ -1 +1 @@
-Subproject commit 593596c5a854f69d28d0c3b9389175a03fa4c696
+Subproject commit f9ca2f49f95e2b51cf0e966ac13b1f285db341cf