diff --git a/Gopkg.lock b/Gopkg.lock
index 8dc9ecc3..81f44b1f 100644
--- a/Gopkg.lock
+++ b/Gopkg.lock
@@ -623,7 +623,7 @@
   revision = "80063a038e333bbe006c878e4c5ce4c74d055498"
 
 [[projects]]
-  digest = "1:ffb498178a6bbe5a877e715cc85a40d5a712883d85f5bf05acf26dbd6c8f71e2"
+  digest = "1:1ec4bc6f7cbf98268fafafea40cdeb5ff5d4914cc9b9ef615fbbfc1ac43c0622"
   name = "google.golang.org/grpc"
   packages = [
     ".",
@@ -660,8 +660,8 @@
     "tap",
   ]
   pruneopts = "NUT"
-  revision = "25c4f928eaa6d96443009bd842389fb4fa48664e"
-  version = "v1.20.1"
+  revision = "501c41df7f472c740d0674ff27122f3f48c80ce7"
+  version = "v1.21.1"
 
 [[projects]]
   digest = "1:85ce4b06f191dd616ad7f4377843ea08db7db003757bd0a67e1b3ac4cbd5c2ef"