diff --git a/go.mod b/go.mod
index 5163bb8..4549abc 100644
--- a/go.mod
+++ b/go.mod
@@ -3,7 +3,7 @@ module github.com/metrue/go-ssh-client
 go 1.12
 
 require (
-	github.com/golang/mock v1.3.1
+	github.com/golang/mock v1.4.4
 	github.com/mitchellh/go-homedir v1.1.0
 	github.com/pkg/errors v0.9.1
 	golang.org/x/crypto v0.0.0-20190701094942-4def268fd1a4
diff --git a/go.sum b/go.sum
index 75ef818..7ab16cd 100644
--- a/go.sum
+++ b/go.sum
@@ -1,5 +1,7 @@
 github.com/golang/mock v1.3.1 h1:qGJ6qTW+x6xX/my+8YUVl4WNpX9B7+/l2tRsHGZ7f2s=
 github.com/golang/mock v1.3.1/go.mod h1:sBzyDLLjw3U8JLTeZvSv8jJB+tU5PVekmnlKIyFUx0Y=
+github.com/golang/mock v1.4.4 h1:l75CXGRSwbaYNpl/Z2X1XIIAMSCquvXgpVZDhwEIJsc=
+github.com/golang/mock v1.4.4/go.mod h1:l3mdAwkq5BuhzHwde/uurv3sEJeZMXNpwsxVWU71h+4=
 github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
 github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
 github.com/pkg/errors v0.8.1 h1:iURUrRGxPUNPdy5/HRSm+Yj6okJ6UtLINN0Q9M4+h3I=