diff --git a/lib/scm/git.js b/lib/scm/git.js
index 8de94ad..f9fcf62 100644
--- a/lib/scm/git.js
+++ b/lib/scm/git.js
@@ -172,5 +172,14 @@ Scm.prototype.getChanges = function(rev1, rev2, callback) {
 };
 
 Scm.prototype.update = function(rev, callback) {
-	this.run({cmd: 'git', args: ['checkout', '-f', rev]}, callback);
+	var self = this;
+	Steppy(
+		function() {
+			self.run({cmd: 'git', args: ['checkout', '-f', rev]}, this.slot());
+		},
+		function() {
+			self.run({cmd: 'git', args: ['submodule', 'update']}, this.slot());
+		},
+		callback
+	);
 };