diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 42486929..8ae6685a 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -4,9 +4,9 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/setup-go@v1
+    - uses: actions/setup-go@v2
       with:
-        go-version: 1.15
+        go-version: 1.16
     - uses: actions/checkout@v2
     - run: make -j all
-    - run: make -j test
\ No newline at end of file
+    - run: make -j test
diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index e54f9f5b..81b55f33 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -7,10 +7,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: actions/setup-go@v1
+      - uses: actions/setup-go@v2
         with:
-          go-version: 1.15
+          go-version: 1.16
       - run: make -j upload
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          GITHUB_RELEASE_UPLOAD_URL: ${{ github.event.release.upload_url }}
\ No newline at end of file
+          GITHUB_RELEASE_UPLOAD_URL: ${{ github.event.release.upload_url }}
diff --git a/go.mod b/go.mod
index 921113c0..bb50089f 100644
--- a/go.mod
+++ b/go.mod
@@ -1,18 +1,8 @@
 module github.com/shadowsocks/go-shadowsocks2
 
-go 1.15
+go 1.16
 
 require (
 	github.com/riobard/go-bloom v0.0.0-20200614022211-cdc8013cb5b3
-	golang.org/x/crypto v0.0.0-20200820211705-5c72a883971a
-	golang.org/x/sys v0.0.0-20200824131525-c12d262b63d8 // indirect
-)
-
-replace (
-	golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2 => github.com/golang/crypto v0.0.0-20190308221718-c2843e01d9a2
-	golang.org/x/crypto v0.0.0-20190426145343-a29dc8fdc734 => github.com/golang/crypto v0.0.0-20190426145343-a29dc8fdc734
-	golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3 => github.com/golang/net v0.0.0-20190404232315-eb5bcb51f2a3
-	golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a => github.com/golang/sys v0.0.0-20190215142949-d0b11bdaac8a
-	golang.org/x/sys v0.0.0-20190412213103-97732733099d => github.com/golang/sys v0.0.0-20190412213103-97732733099d
-	golang.org/x/text v0.3.0 => github.com/golang/text v0.3.0
+	golang.org/x/crypto v0.0.0-20210220033148-5ea612d1eb83
 )
diff --git a/go.sum b/go.sum
index a1733d08..398faaed 100644
--- a/go.sum
+++ b/go.sum
@@ -1,16 +1,11 @@
-github.com/golang/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
-github.com/golang/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
-github.com/golang/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:5JyrLPvD/ZdaYkT7IqKhsP5xt7aLjA99KXRtk4EIYDk=
-github.com/golang/sys v0.0.0-20190412213103-97732733099d h1:blRtD+FQOxZ6P7jigy+HS0R8zyGOMOv8TET4wCpzVwM=
-github.com/golang/sys v0.0.0-20190412213103-97732733099d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
-github.com/golang/text v0.3.0/go.mod h1:GUiq9pdJKRKKAZXiVgWFEvocYuREvC14NhI4OPgEjeE=
-github.com/riobard/go-bloom v0.0.0-20200213042214-218e1707c495 h1:p7xbxYTzzfXghR1kpsJDeoVVRRWAotKc8u7FP/N48rU=
-github.com/riobard/go-bloom v0.0.0-20200213042214-218e1707c495/go.mod h1:HgjTstvQsPGkxUsCd2KWxErBblirPizecHcpD3ffK+s=
 github.com/riobard/go-bloom v0.0.0-20200614022211-cdc8013cb5b3 h1:f/FNXud6gA3MNr8meMVVGxhp+QBTqY91tM8HjEuMjGg=
 github.com/riobard/go-bloom v0.0.0-20200614022211-cdc8013cb5b3/go.mod h1:HgjTstvQsPGkxUsCd2KWxErBblirPizecHcpD3ffK+s=
-golang.org/x/crypto v0.0.0-20200128174031-69ecbb4d6d5d h1:9FCpayM9Egr1baVnV1SX0H87m+XB0B8S0hAMi99X/3U=
-golang.org/x/crypto v0.0.0-20200128174031-69ecbb4d6d5d/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
-golang.org/x/crypto v0.0.0-20200820211705-5c72a883971a h1:vclmkQCjlDX5OydZ9wv8rBCcS0QyQY66Mpf/7BZbInM=
-golang.org/x/crypto v0.0.0-20200820211705-5c72a883971a/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
-golang.org/x/sys v0.0.0-20200824131525-c12d262b63d8 h1:AvbQYmiaaaza3cW3QXRyPo5kYgpFIzOAfeAAN7m3qQ4=
-golang.org/x/sys v0.0.0-20200824131525-c12d262b63d8/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/crypto v0.0.0-20210220033148-5ea612d1eb83 h1:/ZScEX8SfEmUGRHs0gxpqteO5nfNW6axyZbBdw9A12g=
+golang.org/x/crypto v0.0.0-20210220033148-5ea612d1eb83/go.mod h1:jdWPYTVW3xRLrWPugEBEK3UY2ZEsg3UU495nc5E+M+I=
+golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/sys v0.0.0-20191026070338-33540a1f6037 h1:YyJpGZS1sBuBCzLAR1VEpK193GlqGZbnPFnPV/5Rsb4=
+golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/term v0.0.0-20201117132131-f5c789dd3221/go.mod h1:Nr5EML6q2oocZ2LXRh80K7BxOlk5/8JxuGnuhpl+muw=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=