diff --git a/Godeps/Godeps.json b/Godeps/Godeps.json
index 163330de2..f92a81af7 100644
--- a/Godeps/Godeps.json
+++ b/Godeps/Godeps.json
@@ -38,6 +38,10 @@
 			"ImportPath": "github.com/cheggaaa/pb",
 			"Rev": "d7729fd7ec1372c15b83db39834bf842bf2d69fb"
 		},
+		{
+			"ImportPath": "github.com/chriscool/go-sleep",
+			"Rev": "743ab5f1bb487edf1772bc29ca0bdf572b40785e"
+		},
 		{
 			"ImportPath": "github.com/codahale/hdrhistogram",
 			"Rev": "5fd85ec0b4e2dd5d4158d257d943f2e586d86b62"
@@ -184,7 +188,7 @@
 		},
 		{
 			"ImportPath": "github.com/jbenet/goprocess",
-			"Rev": "ea63e9540cd19cb39e0e4c4442b9c27664287bb8"
+			"Rev": "67fe91f1081e806f1bb51051c972ac782ea46d85"
 		},
 		{
 			"ImportPath": "github.com/kardianos/osext",
diff --git a/Godeps/_workspace/src/github.com/jbenet/goprocess/goprocess.go b/Godeps/_workspace/src/github.com/jbenet/goprocess/goprocess.go
index 762cecb20..17cb37799 100644
--- a/Godeps/_workspace/src/github.com/jbenet/goprocess/goprocess.go
+++ b/Godeps/_workspace/src/github.com/jbenet/goprocess/goprocess.go
@@ -115,6 +115,9 @@ type Process interface {
 	// It is useful to construct simple asynchronous workers, children of p.
 	Go(f ProcessFunc) Process
 
+	// SetTeardown sets the process's teardown to tf.
+	SetTeardown(tf TeardownFunc)
+
 	// Close ends the process. Close blocks until the process has completely
 	// shut down, and any teardown has run _exactly once_. The returned error
 	// is available indefinitely: calling Close twice returns the same error.
diff --git a/Godeps/_workspace/src/github.com/jbenet/goprocess/goprocess_test.go b/Godeps/_workspace/src/github.com/jbenet/goprocess/goprocess_test.go
index 26bb5b42b..8516e03d0 100644
--- a/Godeps/_workspace/src/github.com/jbenet/goprocess/goprocess_test.go
+++ b/Godeps/_workspace/src/github.com/jbenet/goprocess/goprocess_test.go
@@ -123,17 +123,13 @@ func TestTeardownCalledOnce(t *testing.T) {
 		}
 	}
 
-	setTeardown := func(t tree, tf TeardownFunc) {
-		t.Process.(*process).teardown = tf
-	}
-
-	setTeardown(a, onlyOnce())
-	setTeardown(a.c[0], onlyOnce())
-	setTeardown(a.c[0].c[0], onlyOnce())
-	setTeardown(a.c[0].c[1], onlyOnce())
-	setTeardown(a.c[1], onlyOnce())
-	setTeardown(a.c[1].c[0], onlyOnce())
-	setTeardown(a.c[1].c[1], onlyOnce())
+	a.SetTeardown(onlyOnce())
+	a.c[0].SetTeardown(onlyOnce())
+	a.c[0].c[0].SetTeardown(onlyOnce())
+	a.c[0].c[1].SetTeardown(onlyOnce())
+	a.c[1].SetTeardown(onlyOnce())
+	a.c[1].c[0].SetTeardown(onlyOnce())
+	a.c[1].c[1].SetTeardown(onlyOnce())
 
 	a.c[0].c[0].Close()
 	a.c[0].c[0].Close()
diff --git a/Godeps/_workspace/src/github.com/jbenet/goprocess/impl-mutex.go b/Godeps/_workspace/src/github.com/jbenet/goprocess/impl-mutex.go
index 47a73fedd..de246a8fa 100644
--- a/Godeps/_workspace/src/github.com/jbenet/goprocess/impl-mutex.go
+++ b/Godeps/_workspace/src/github.com/jbenet/goprocess/impl-mutex.go
@@ -114,6 +114,16 @@ func (p *process) Go(f ProcessFunc) Process {
 	return child
 }
 
+// SetTeardown to assign a teardown function
+func (p *process) SetTeardown(tf TeardownFunc) {
+	if tf == nil {
+		tf = nilTeardownFunc
+	}
+	p.Lock()
+	p.teardown = tf
+	p.Unlock()
+}
+
 // Close is the external close function.
 // it's a wrapper around internalClose that waits on Closed()
 func (p *process) Close() error {