diff --git a/scripts/wrapped_geth_dev.sh b/scripts/wrapped_geth_dev.sh
index ceadde03..e7431a5d 100755
--- a/scripts/wrapped_geth_dev.sh
+++ b/scripts/wrapped_geth_dev.sh
@@ -21,6 +21,13 @@ main() {
         exit 1
     fi
 
+    # CONCURRENT_BLOCK_FLUSHING=true ./scripts/run_firehose_geth_dev.sh 3.0 prague
+    concurrent_block_flushing="${CONCURRENT_BLOCK_FLUSHING:-0}"
+    if ! [[ "$concurrent_block_flushing" =~ ^[0-9]+$ ]]; then
+        echo "Invalid CONCURRENT_BLOCK_FLUSHING value: '$concurrent_block_flushing'. Must be a non-negative integer."
+        exit 1
+    fi
+
     "$geth" --dev --datadir="$data_dir" "--gcmode=archive" "--state.scheme=hash" init "$ROOT/geth_dev/genesis.$fork_version.json" 2> /dev/null
 
     geth_extra_args=("--dev" "--dev.period=1" "--http" "--http.api=eth,web3,net" "--datadir=$data_dir" "--gcmode=archive" "--state.scheme=hash")
@@ -36,7 +43,9 @@ main() {
             fi
 
             # There must be no spaces in the JSON config string otherwise bash is not happy
-            geth_extra_args+=("--vmtrace.jsonconfig={\"applyBackwardCompatibility\":${backward_compatibility}${forced_backward_compatibility}}")
+            json_config="{\"applyBackwardCompatibility\":${backward_compatibility},\"concurrentBlockFlushing\":${concurrent_block_flushing}${forced_backward_compatibility}}"
+            echo "Using vmtrace.jsonconfig: $json_config"
+            geth_extra_args+=("--vmtrace.jsonconfig=$json_config")
         fi
     fi