diff --git a/go.mod b/go.mod
index f7d29310b5a..379485499dc 100644
--- a/go.mod
+++ b/go.mod
@@ -17,8 +17,8 @@ require (
 	gopkg.in/go-playground/assert.v1 v1.2.1 // indirect
 	gopkg.in/go-playground/webhooks.v3 v3.13.0
 	gopkg.in/yaml.v2 v2.3.0
-	knative.dev/hack v0.0.0-20201214230143-4ed1ecb8db24
-	knative.dev/net-istio v0.19.1-0.20201231033530-22067c7b3c59
+	knative.dev/hack v0.0.0-20210114150620-4422dcadb3c8
+	knative.dev/net-istio v0.20.1-0.20210114170820-b4b1c95dc264
 )
 
 replace go.opencensus.io => go.opencensus.io v0.20.2
diff --git a/go.sum b/go.sum
index 3680d64a193..24036647005 100644
--- a/go.sum
+++ b/go.sum
@@ -1072,11 +1072,13 @@ k8s.io/utils v0.0.0-20200324210504-a9aa75ae1b89/go.mod h1:sZAwmy6armz5eXlNoLmJcl
 k8s.io/utils v0.0.0-20200603063816-c1c6865ac451/go.mod h1:jPW/WVKK9YHAvNhRxK0md/EJ228hCsBRufyofKtW8HA=
 knative.dev/hack v0.0.0-20201214230143-4ed1ecb8db24 h1:kIztWfvnIFV8Lhlea02K3YO2mIzcDyQNzrBLn0Oq9sA=
 knative.dev/hack v0.0.0-20201214230143-4ed1ecb8db24/go.mod h1:PHt8x8yX5Z9pPquBEfIj0X66f8iWkWfR0S/sarACJrI=
-knative.dev/net-istio v0.19.1-0.20201231033530-22067c7b3c59 h1:QstfeRxVD6gXxJnqF63h5+kSx4uYcrqXukY5chOg1w0=
-knative.dev/net-istio v0.19.1-0.20201231033530-22067c7b3c59/go.mod h1:bi4tkdkBa1570VmmdqLkaN5k+P4ouNEq6brAXRsvSCo=
-knative.dev/networking v0.0.0-20201224020004-585f3dd359b2/go.mod h1:dI7bcSE6XNlmVfZVZx4oN7qLmFgiO4hLdzPV6hwfgTs=
-knative.dev/pkg v0.0.0-20201223002104-9d0775512af8/go.mod h1:hckgW978SdzPA2H5EDvRPY8xsnPuDZLJLbPf8Jte7Q0=
-knative.dev/pkg v0.0.0-20201224024804-27db5ac24cfb/go.mod h1:hckgW978SdzPA2H5EDvRPY8xsnPuDZLJLbPf8Jte7Q0=
+knative.dev/hack v0.0.0-20210112093330-d946d2557383/go.mod h1:PHt8x8yX5Z9pPquBEfIj0X66f8iWkWfR0S/sarACJrI=
+knative.dev/hack v0.0.0-20210114150620-4422dcadb3c8 h1:N/Kt6C5zZzTtFcTntRThB+vEJ7WcLKaZ5Q2Jm7b23vw=
+knative.dev/hack v0.0.0-20210114150620-4422dcadb3c8/go.mod h1:PHt8x8yX5Z9pPquBEfIj0X66f8iWkWfR0S/sarACJrI=
+knative.dev/net-istio v0.20.1-0.20210114170820-b4b1c95dc264 h1:mcYdahUgJLQ8ThJL5TVEoh77uMvQ1I00LN3TMzof0rU=
+knative.dev/net-istio v0.20.1-0.20210114170820-b4b1c95dc264/go.mod h1:Lum3PhFU7JweJQ1+sGka04/vphohTDhYRYqa3CfrYLU=
+knative.dev/networking v0.0.0-20210113172032-07a8160d1971/go.mod h1:lAll0+JcN2iKex0P9hOXZ4siOdryW+HIuK4KBRM+ca4=
+knative.dev/pkg v0.0.0-20210112143930-acbf2af596cf/go.mod h1:hckgW978SdzPA2H5EDvRPY8xsnPuDZLJLbPf8Jte7Q0=
 pgregory.net/rapid v0.3.3/go.mod h1:UYpPVyjFHzYBGHIxLFoupi8vwk6rXNzRY9OMvVxFIOU=
 rsc.io/binaryregexp v0.2.0/go.mod h1:qTv7/COck+e2FymRvadv62gMdZztPaShugOCi3I+8D8=
 rsc.io/quote/v3 v3.1.0/go.mod h1:yEA65RcK8LyAZtP9Kv3t0HmxON59tX3rD+tICJqUlj0=
diff --git a/vendor/knative.dev/hack/codegen-library.sh b/vendor/knative.dev/hack/codegen-library.sh
index cb9c282b28c..062b904997a 100644
--- a/vendor/knative.dev/hack/codegen-library.sh
+++ b/vendor/knative.dev/hack/codegen-library.sh
@@ -26,6 +26,7 @@ else
 fi
 
 export GOPATH=$(go_mod_gopath_hack)
+export GOBIN=${GOPATH}/bin # Set GOBIN explicitly as deepcopy-gen is installed by go install.
 export MODULE_NAME=$(go_mod_module_name)
 export CODEGEN_PKG=${CODEGEN_PKG:-$(cd ${REPO_ROOT_DIR}; ls -d -1 ./vendor/k8s.io/code-generator 2>/dev/null || echo ../code-generator)}
 export KNATIVE_CODEGEN_PKG=${KNATIVE_CODEGEN_PKG:-$(cd ${REPO_ROOT_DIR}; ls -d -1 ./vendor/knative.dev/pkg 2>/dev/null || echo ../pkg)}
diff --git a/vendor/modules.txt b/vendor/modules.txt
index faaf69f9fbf..554c512aa6b 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -268,10 +268,10 @@ gopkg.in/go-playground/webhooks.v3/github
 # gopkg.in/yaml.v2 v2.3.0
 ## explicit
 gopkg.in/yaml.v2
-# knative.dev/hack v0.0.0-20201214230143-4ed1ecb8db24
+# knative.dev/hack v0.0.0-20210114150620-4422dcadb3c8
 ## explicit
 knative.dev/hack
-# knative.dev/net-istio v0.19.1-0.20201231033530-22067c7b3c59
+# knative.dev/net-istio v0.20.1-0.20210114170820-b4b1c95dc264
 ## explicit
 knative.dev/net-istio/third_party/istio-stable
 # go.opencensus.io => go.opencensus.io v0.20.2