diff --git a/shell.js b/shell.js
index e69d197..4be600b 100644
--- a/shell.js
+++ b/shell.js
@@ -31,6 +31,8 @@ function exec(tag, file, args, options, callback) {
 
     debug(tag + ' execFile: %s %s', file, args.join(' '));
 
+    options.maxBuffer = 1000 * 1024; // in bytes default is 200*1024
+
     var cp = child_process.spawn(file, args, options);
     cp.stdout.on('data', function (data) {
         debug(tag + ' (stdout): %s', data.toString('utf8'));
@@ -68,6 +70,8 @@ function system(tag, cmd, options, callback) {
 
     debug(tag + ' system: %s %j', cmd, options);
 
+    options.maxBuffer = 1000 * 1024; // in bytes default is 200*1024
+
     var cp = child_process.exec(cmd, options, function (error, stdout, stderr) {
         if (error) debug(tag + ' (error) ' + error);