diff --git a/README.md b/README.md
index a3265da..705c2b6 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,7 @@ Run `node ./scanner.js [options] --ip <ip range>`
 * `--min-players <count>` - Minimum number of players.
 * `--max-players <count>` - Maximum player count.
 * `--version <glob expression>` - Glob expression to filter version (eg- `1.19.*`, or `1.1*.*`). (Default: `*`)
+* `--conc <howmany>` - How many concurrent connections to use for scanning. (Default is 256)
 
 #### Output Options
 * `--show-desc` - Enable showing of server description in output.
@@ -47,5 +48,5 @@ Run `node ./scanner.js [options] --ip <ip range>`
 In this example it took `3.183` seconds to scan `255` IP addresses, and find `85` MineCraft servers. At this speed, a full `/16` (`123.45.0.0 - 123.45.255.255`) will take about `13.5` minutes to scan.
 
 ## Limitations
-* Fails to scan more than a /16 without kicking the bucket... so you should probably stick to that or smaller ranges.
+* Fails to scan more than a /10 without kicking the bucket... so you should probably stick to that or smaller ranges.
 * Working on a Minecraft bot client... doesn't work though... you can see how badly it doesn't work by using `--enable-client` flag... it is totally broken. **Don't use it**.
\ No newline at end of file
diff --git a/scanner.js b/scanner.js
index 23cac77..02492af 100644
--- a/scanner.js
+++ b/scanner.js
@@ -13,6 +13,7 @@ var SCAN_OPTS_HOSTS = (process.params['ip']||'0.0.0.0/0').toString();
 var SCAN_OPTS_PORTS = (process.params['port'] || MINECRAFT_DEFAULT_PORT).toString();
 var SCAN_OPTS_OUTPUT_CSV = (process.params['out']||null);
 var SCAN_OPTS_VERSION_FILTER = (process.params['version']||'*');
+var SCAN_OPTS_CONCURRENCY = (process.params['conc'] || 256);
 var CLIENT_TOKEN;
 
 if(process.params['geo-ip'])
@@ -88,14 +89,14 @@ if(process.params['enable-client'] && !process.params['client-token'])
 	});
 }
 
-console.log("Scanning ports " + SCAN_OPTS_PORTS + " on " + SCAN_OPTS_HOSTS);
+console.log("Scanning ports " + SCAN_OPTS_PORTS + " on " + SCAN_OPTS_HOSTS + " with " + SCAN_OPTS_CONCURRENCY " connections.");
 
 var options = {
 	target: SCAN_OPTS_HOSTS,
 	port: SCAN_OPTS_PORTS,
 	states: 'O',
 	banner: false,
-	concurrency: 256
+	concurrency: SCAN_OPTS_CONCURRENCY
 }
 var scan = new Scanner(options);