diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f0e76f3df..e1faa0bfa 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -104,4 +104,16 @@ jobs:
     - run: go version ; cargo version ; cmake --version 
     - run: scripts/reset-submodule.cmd
     - run: cargo build
-    - run: cargo test --all
\ No newline at end of file
+    - run: cargo test --all
+  
+  Pre-Release:
+    name: Pre-Release
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - run: scripts/reset-submodule.cmd
+    - run: cd grpc-sys && cargo publish --dry-run
+    - name: Check generated package size
+      run: |
+        ls -alh target/package/grpcio-sys-*.crate
+        test `cat target/package/grpcio-sys-*.crate | wc -c` -le 10485760
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4965a8161..d4c0b5293 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,14 @@
+# 0.6.0 - 2020-06-12
+
+- Switch to std::future (#447)
+- Update gRPC C core to 1.29.1 (#466)
+- Change spinlock to parking_lot::Mutex (#468)
+
+# 0.5.3 - 2020-05-07
+
+- Switch to github action and update badge (#459)
+- Enable ALPN by default (#456)
+
 # grpcio-sys 0.5.2 - 2020-03-31
 
 - Downgrade bindgen version to be backward compatible. (#452)
@@ -8,7 +19,7 @@
 - Support unix domain socket (#446)
 - Build: fix rebuild rules for no prebuilt bindings (#450)
 
-# 0.5.0 - 2019-03-16
+# 0.5.0 - 2020-03-16
 
 - Make `build_args` and `channel_args` public (#405)
 - Reclaim buffer memory after sending message (#407)
diff --git a/Cargo.toml b/Cargo.toml
index a5d82b170..7775f3070 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "grpcio"
-version = "0.5.1"
+version = "0.6.0"
 edition = "2018"
 authors = ["The TiKV Project Developers"]
 license = "Apache-2.0"
@@ -17,7 +17,7 @@ autoexamples = false
 all-features = true
 
 [dependencies]
-grpcio-sys = { path = "grpc-sys", version = "0.5.0" }
+grpcio-sys = { path = "grpc-sys", version = "0.6.0" }
 libc = "0.2"
 futures = "0.3"
 protobuf = { version = "2.0", optional = true }
@@ -45,4 +45,5 @@ debug = true
 travis-ci = { repository = "tikv/grpc-rs" }
 
 [patch.crates-io]
-grpcio-compiler = { path = "compiler", version = "0.5.0", default-features = false }
+grpcio-compiler = { path = "compiler", version = "0.6.0", default-features = false }
+protobuf-build = { git = "https://github.com/tikv/protobuf-build.git" }
diff --git a/README.md b/README.md
index 7bb4e330a..03f4e19c4 100644
--- a/README.md
+++ b/README.md
@@ -26,14 +26,14 @@ This project is still under development. The following features with the check m
 ## Prerequisites
 
 - CMake >= 3.8.0
-- Rust >= 1.19.0
+- Rust >= 1.36.0
 - binutils >= 2.22
 - LLVM and Clang >= 3.9 if you need to generate bindings at compile time.
-- By default, the [secure feature](#feature-secure) is provided by boringssl, which requires Go (>=1.7) to build. You can also use openssl instead by enabling [openssl feature](#feature-openssl).
+- By default, the [secure feature](#feature-secure) is provided by boringssl. You can also use openssl instead by enabling [openssl feature](#feature-openssl).
 
 For Linux and MacOS, you also need to install gcc (or clang) too.
 
-Bindings are pre-generated for x86_64 Linux. For other platforms, bindings are generated at compile time.
+Bindings are pre-generated for x86_64/arm64 Linux. For other platforms, bindings are generated at compile time.
 
 For Windows, you also need to install following software:
 
@@ -90,7 +90,7 @@ To include this project as a dependency:
 
 ```
 [dependencies]
-grpcio = "0.4"
+grpcio = "0.6"
 ```
 
 ### Feature `secure`
@@ -100,10 +100,17 @@ mechanism. When you do not need it, for example when working in intranet,
 you can disable it by using the following configuration:
 ```
 [dependencies]
-grpcio = { version = "0.4", default-features = false, features = ["protobuf-codec"] }
+grpcio = { version = "0.6", default-features = false, features = ["protobuf-codec"] }
 ```
 
-### Feature `openssl`
+### Feature `prost-codec` and `protobuf-codec`
+
+`gRPC-rs` uses `protobuf` crate by default. If you want to use `prost` instead, you can enable
+`prost-codec` feature. You probably only want to enable only one of the two features. Though
+grpcio is completely fine with both features enabled at the same time, grpcio-compiler
+will not going to work as expected.
+
+### Feature `openssl` and `openssl-vendored`
 
 `gRPC-rs` comes vendored with `gRPC Core`, which by default uses BoringSSL
 instead of OpenSSL. This may cause linking issues due to symbol clashes and/or
@@ -113,9 +120,12 @@ your `Cargo.toml`'s features list for `gprcio`, which requires openssl (>=1.0.2)
 
 ```toml
 [dependencies]
-grpcio = { version = "0.4.4", features = ["openssl"] }
+grpcio = { version = "0.6", features = ["openssl"] }
 ```
 
+Feature `openssl-vendored` is the same as feature `openssl` except it will build openssl from
+bundled sources.
+
 ## Performance
 
 See [benchmark](https://github.com/tikv/grpc-rs/tree/master/benchmark) to find out how to run a benchmark by yourself.
diff --git a/compiler/Cargo.toml b/compiler/Cargo.toml
index 6ddea7dc4..07731e011 100644
--- a/compiler/Cargo.toml
+++ b/compiler/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "grpcio-compiler"
-version = "0.5.0"
+version = "0.6.0"
 edition = "2018"
 authors = ["The TiKV Project Developers"]
 license = "Apache-2.0"
diff --git a/grpc-sys/Cargo.toml b/grpc-sys/Cargo.toml
index 9f18193a6..fcd38d68a 100644
--- a/grpc-sys/Cargo.toml
+++ b/grpc-sys/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "grpcio-sys"
-version = "0.5.2"
+version = "0.6.0"
 authors = ["The TiKV Project Developers"]
 license = "Apache-2.0"
 keywords = ["grpc", "bindings"]
@@ -26,8 +26,14 @@ exclude = [
     "grpc/src/ruby/*",
     "grpc/test/core/end2end/*",
     "grpc/third_party/zlib/*",
+    "grpc/third_party/abseil-cpp/absl/time/internal/cctz/testdata",
     "grpc/third_party/benchmark/*",
     "grpc/third_party/bloaty/*",
+    "grpc/third_party/boringssl-with-bazel/crypto_test_data.cc",
+    "grpc/third_party/boringssl-with-bazel/src/fuzz",
+    "grpc/third_party/boringssl-with-bazel/src/crypto/cipher_extra/test",
+    "grpc/third_party/boringssl-with-bazel/src/third_party/wycheproof_testvectors",
+    "grpc/third_party/boringssl-with-bazel/src/third_party/googletest",
     "grpc/third_party/libuv/*",
     "grpc/third_party/gflags/*",
     "grpc/third_party/googletest/*",
diff --git a/proto/Cargo.toml b/proto/Cargo.toml
index 07168c79a..d845452e7 100644
--- a/proto/Cargo.toml
+++ b/proto/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "grpcio-proto"
-version = "0.5.0"
+version = "0.6.0"
 edition = "2018"
 authors = ["The TiKV Project Developers"]
 license = "Apache-2.0"
@@ -19,7 +19,7 @@ prost-codec = ["prost-derive", "bytes", "lazy_static", "grpcio/prost-codec", "pr
 
 [dependencies]
 futures = "0.3"
-grpcio = { path = "..", features = ["secure"], version = "0.5.0", default-features = false }
+grpcio = { path = "..", features = ["secure"], version = "0.6.0", default-features = false }
 bytes = { version = "0.5", optional = true }
 prost = { version = "0.6", optional = true }
 prost-derive = { version = "0.6", optional = true }
diff --git a/tests-and-examples/Cargo.toml b/tests-and-examples/Cargo.toml
index dd2b65a00..2df551e90 100644
--- a/tests-and-examples/Cargo.toml
+++ b/tests-and-examples/Cargo.toml
@@ -3,6 +3,7 @@ name = "tests-and-examples"
 version = "0.1.0"
 edition = "2018"
 autoexamples = false
+publish = false
 
 [features]
 default = ["protobuf-codec"]
@@ -10,20 +11,20 @@ protobuf-codec = ["protobuf", "grpcio/protobuf-codec", "grpcio-proto/protobuf-co
 prost-codec = ["prost", "bytes", "grpcio/prost-codec", "grpcio-proto/prost-codec"]
 
 [dependencies]
-grpcio-sys = { path = "../grpc-sys", version = "0.5.0" }
+grpcio-sys = { path = "../grpc-sys", version = "0.6.0" }
 libc = "0.2"
 futures = "0.3"
 protobuf = { version = "2.0", optional = true }
 prost = { version = "0.6", optional = true }
 bytes = { version = "0.5", optional = true }
 log = "0.4"
-grpcio = { path = "..", version = "0.5.0", default-features = false, features = ["secure"] }
+grpcio = { path = "..", version = "0.6.0", default-features = false, features = ["secure"] }
 
 [dev-dependencies]
 serde_json = "1.0"
 serde = "1.0"
 serde_derive = "1.0"
-grpcio-proto = { path = "../proto", version = "0.5.0", default-features = false }
+grpcio-proto = { path = "../proto", version = "0.6.0", default-features = false }
 rand = "0.7"
 slog = "2.0"
 slog-async = "2.1"