diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4959e2b02..96ff94f89 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,11 +2,14 @@
 
 ## [Unreleased]
 
+## [4.0.0-pre.8] - 2022-04-19
+
 ### Added
 - Added `Debug` and `PartialEq` implementations for `PromiseError`. [PR 728](https://github.com/near/near-sdk-rs/pull/728).
 - Added convenience function `env::block_timestamp_ms` to return ms since 1970. [PR 736](https://github.com/near/near-sdk-rs/pull/728)
 - Added an optional way to handle contract errors with `Result`. [PR 745](https://github.com/near/near-sdk-rs/pull/745), [PR 754](https://github.com/near/near-sdk-rs/pull/754) and [PR 757](https://github.com/near/near-sdk-rs/pull/757).
 - Added support for using `#[callback_result]` with a function that doesn't have a return. [PR 738](https://github.com/near/near-sdk-rs/pull/738)
+- Support for multi-architecture docker builds and updated Rust version to 1.56 with latest [contract builder](https://hub.docker.com/r/nearprotocol/contract-builder). [PR 751](https://github.com/near/near-sdk-rs/pull/751)
 
 ### Fixes
 - Disallow invalid `Promise::then` chains. Will now panic with `promise_1.then(promise_2.then(promise_3))` syntax. [PR 410](https://github.com/near/near-sdk-rs/pull/410)
diff --git a/examples/callback-results/Cargo.lock b/examples/callback-results/Cargo.lock
index bf463fc0e..3dbea1d93 100644
--- a/examples/callback-results/Cargo.lock
+++ b/examples/callback-results/Cargo.lock
@@ -1484,7 +1484,7 @@ dependencies = [
 
 [[package]]
 name = "near-sdk"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 dependencies = [
  "base64 0.13.0",
  "borsh",
@@ -1500,7 +1500,7 @@ dependencies = [
 
 [[package]]
 name = "near-sdk-macros"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 dependencies = [
  "Inflector",
  "proc-macro2",
diff --git a/examples/callback-results/res/callback_results.wasm b/examples/callback-results/res/callback_results.wasm
index a689687c4..fe8eba8a5 100755
Binary files a/examples/callback-results/res/callback_results.wasm and b/examples/callback-results/res/callback_results.wasm differ
diff --git a/examples/cross-contract-calls/Cargo.lock b/examples/cross-contract-calls/Cargo.lock
index 4704c7dda..edfa65560 100644
--- a/examples/cross-contract-calls/Cargo.lock
+++ b/examples/cross-contract-calls/Cargo.lock
@@ -1534,7 +1534,7 @@ dependencies = [
 
 [[package]]
 name = "near-sdk"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 dependencies = [
  "base64 0.13.0",
  "borsh",
@@ -1550,7 +1550,7 @@ dependencies = [
 
 [[package]]
 name = "near-sdk-macros"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 dependencies = [
  "Inflector",
  "proc-macro2",
diff --git a/examples/cross-contract-calls/res/cross_contract_high_level.wasm b/examples/cross-contract-calls/res/cross_contract_high_level.wasm
index b31024a14..c49c2376b 100755
Binary files a/examples/cross-contract-calls/res/cross_contract_high_level.wasm and b/examples/cross-contract-calls/res/cross_contract_high_level.wasm differ
diff --git a/examples/cross-contract-calls/res/cross_contract_low_level.wasm b/examples/cross-contract-calls/res/cross_contract_low_level.wasm
index 2e050f488..1d0342429 100755
Binary files a/examples/cross-contract-calls/res/cross_contract_low_level.wasm and b/examples/cross-contract-calls/res/cross_contract_low_level.wasm differ
diff --git a/examples/factory-contract/Cargo.lock b/examples/factory-contract/Cargo.lock
index fdd949172..24210a044 100644
--- a/examples/factory-contract/Cargo.lock
+++ b/examples/factory-contract/Cargo.lock
@@ -1534,7 +1534,7 @@ dependencies = [
 
 [[package]]
 name = "near-sdk"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 dependencies = [
  "base64 0.13.0",
  "borsh",
@@ -1550,7 +1550,7 @@ dependencies = [
 
 [[package]]
 name = "near-sdk-macros"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 dependencies = [
  "Inflector",
  "proc-macro2",
diff --git a/examples/factory-contract/res/factory_contract_high_level.wasm b/examples/factory-contract/res/factory_contract_high_level.wasm
index cd835d48b..e787f9c3d 100755
Binary files a/examples/factory-contract/res/factory_contract_high_level.wasm and b/examples/factory-contract/res/factory_contract_high_level.wasm differ
diff --git a/examples/factory-contract/res/factory_contract_low_level.wasm b/examples/factory-contract/res/factory_contract_low_level.wasm
index dd37c2d43..1e7f1daab 100755
Binary files a/examples/factory-contract/res/factory_contract_low_level.wasm and b/examples/factory-contract/res/factory_contract_low_level.wasm differ
diff --git a/examples/fungible-token/Cargo.lock b/examples/fungible-token/Cargo.lock
index 1687e0285..46db2e6ed 100644
--- a/examples/fungible-token/Cargo.lock
+++ b/examples/fungible-token/Cargo.lock
@@ -1226,7 +1226,7 @@ dependencies = [
 
 [[package]]
 name = "near-contract-standards"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 dependencies = [
  "near-sdk",
  "serde",
@@ -1522,7 +1522,7 @@ dependencies = [
 
 [[package]]
 name = "near-sdk"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 dependencies = [
  "base64 0.13.0",
  "borsh",
@@ -1538,7 +1538,7 @@ dependencies = [
 
 [[package]]
 name = "near-sdk-macros"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 dependencies = [
  "Inflector",
  "proc-macro2",
diff --git a/examples/fungible-token/res/defi.wasm b/examples/fungible-token/res/defi.wasm
index 82ea677f7..b31ebb4fa 100755
Binary files a/examples/fungible-token/res/defi.wasm and b/examples/fungible-token/res/defi.wasm differ
diff --git a/examples/fungible-token/res/fungible_token.wasm b/examples/fungible-token/res/fungible_token.wasm
index 7294bd9c6..db9b17266 100755
Binary files a/examples/fungible-token/res/fungible_token.wasm and b/examples/fungible-token/res/fungible_token.wasm differ
diff --git a/examples/lockable-fungible-token/Cargo.lock b/examples/lockable-fungible-token/Cargo.lock
index 08aab81e3..87f9f8811 100644
--- a/examples/lockable-fungible-token/Cargo.lock
+++ b/examples/lockable-fungible-token/Cargo.lock
@@ -1544,7 +1544,7 @@ dependencies = [
 
 [[package]]
 name = "near-sdk"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 dependencies = [
  "base64 0.13.0",
  "borsh",
@@ -1560,7 +1560,7 @@ dependencies = [
 
 [[package]]
 name = "near-sdk-macros"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 dependencies = [
  "Inflector",
  "proc-macro2",
diff --git a/examples/lockable-fungible-token/res/lockable_fungible_token.wasm b/examples/lockable-fungible-token/res/lockable_fungible_token.wasm
index 2d88e5195..4560e5450 100755
Binary files a/examples/lockable-fungible-token/res/lockable_fungible_token.wasm and b/examples/lockable-fungible-token/res/lockable_fungible_token.wasm differ
diff --git a/examples/mission-control/Cargo.lock b/examples/mission-control/Cargo.lock
index aee6a6a5f..43e798916 100644
--- a/examples/mission-control/Cargo.lock
+++ b/examples/mission-control/Cargo.lock
@@ -629,7 +629,7 @@ dependencies = [
 
 [[package]]
 name = "near-sdk"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 dependencies = [
  "base64 0.13.0",
  "borsh",
@@ -645,7 +645,7 @@ dependencies = [
 
 [[package]]
 name = "near-sdk-macros"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 dependencies = [
  "Inflector",
  "proc-macro2",
diff --git a/examples/mission-control/res/mission_control.wasm b/examples/mission-control/res/mission_control.wasm
index 0a2e98e79..28b28fbd5 100755
Binary files a/examples/mission-control/res/mission_control.wasm and b/examples/mission-control/res/mission_control.wasm differ
diff --git a/examples/non-fungible-token/Cargo.lock b/examples/non-fungible-token/Cargo.lock
index 94b3c27af..437a424d5 100644
--- a/examples/non-fungible-token/Cargo.lock
+++ b/examples/non-fungible-token/Cargo.lock
@@ -1203,7 +1203,7 @@ dependencies = [
 
 [[package]]
 name = "near-contract-standards"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 dependencies = [
  "near-sdk",
  "serde",
@@ -1499,7 +1499,7 @@ dependencies = [
 
 [[package]]
 name = "near-sdk"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 dependencies = [
  "base64 0.13.0",
  "borsh",
@@ -1515,7 +1515,7 @@ dependencies = [
 
 [[package]]
 name = "near-sdk-macros"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 dependencies = [
  "Inflector",
  "proc-macro2",
diff --git a/examples/non-fungible-token/res/approval_receiver.wasm b/examples/non-fungible-token/res/approval_receiver.wasm
index 881684ec2..2a3b0653e 100755
Binary files a/examples/non-fungible-token/res/approval_receiver.wasm and b/examples/non-fungible-token/res/approval_receiver.wasm differ
diff --git a/examples/non-fungible-token/res/non_fungible_token.wasm b/examples/non-fungible-token/res/non_fungible_token.wasm
index 7ab18f665..262ba42bc 100755
Binary files a/examples/non-fungible-token/res/non_fungible_token.wasm and b/examples/non-fungible-token/res/non_fungible_token.wasm differ
diff --git a/examples/non-fungible-token/res/token_receiver.wasm b/examples/non-fungible-token/res/token_receiver.wasm
index 7c038c87e..3368a1c7d 100755
Binary files a/examples/non-fungible-token/res/token_receiver.wasm and b/examples/non-fungible-token/res/token_receiver.wasm differ
diff --git a/examples/status-message-collections/Cargo.lock b/examples/status-message-collections/Cargo.lock
index 2d6a367fb..f3eeb02a8 100644
--- a/examples/status-message-collections/Cargo.lock
+++ b/examples/status-message-collections/Cargo.lock
@@ -622,7 +622,7 @@ dependencies = [
 
 [[package]]
 name = "near-sdk"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 dependencies = [
  "base64 0.13.0",
  "borsh",
@@ -638,7 +638,7 @@ dependencies = [
 
 [[package]]
 name = "near-sdk-macros"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 dependencies = [
  "Inflector",
  "proc-macro2",
diff --git a/examples/status-message-collections/res/status_message_collections.wasm b/examples/status-message-collections/res/status_message_collections.wasm
index 79d8babfe..d26a78e69 100755
Binary files a/examples/status-message-collections/res/status_message_collections.wasm and b/examples/status-message-collections/res/status_message_collections.wasm differ
diff --git a/examples/status-message/Cargo.lock b/examples/status-message/Cargo.lock
index c9971878f..59ad2d897 100644
--- a/examples/status-message/Cargo.lock
+++ b/examples/status-message/Cargo.lock
@@ -622,7 +622,7 @@ dependencies = [
 
 [[package]]
 name = "near-sdk"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 dependencies = [
  "base64 0.13.0",
  "borsh",
@@ -638,7 +638,7 @@ dependencies = [
 
 [[package]]
 name = "near-sdk-macros"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 dependencies = [
  "Inflector",
  "proc-macro2",
diff --git a/examples/status-message/res/status_message.wasm b/examples/status-message/res/status_message.wasm
index 229715d02..0e2e1fa4f 100755
Binary files a/examples/status-message/res/status_message.wasm and b/examples/status-message/res/status_message.wasm differ
diff --git a/examples/test-contract/Cargo.lock b/examples/test-contract/Cargo.lock
index 3370ec118..4a2795597 100644
--- a/examples/test-contract/Cargo.lock
+++ b/examples/test-contract/Cargo.lock
@@ -622,7 +622,7 @@ dependencies = [
 
 [[package]]
 name = "near-sdk"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 dependencies = [
  "base64 0.13.0",
  "borsh",
@@ -638,7 +638,7 @@ dependencies = [
 
 [[package]]
 name = "near-sdk-macros"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 dependencies = [
  "Inflector",
  "proc-macro2",
diff --git a/near-contract-standards/Cargo.toml b/near-contract-standards/Cargo.toml
index 76af9e441..ab7b45dbc 100644
--- a/near-contract-standards/Cargo.toml
+++ b/near-contract-standards/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "near-contract-standards"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 authors = ["Near Inc <hello@near.org>"]
 edition = "2018"
 license = "GPL-3.0"
@@ -13,6 +13,6 @@ NEAR smart contracts standard library.
 """
 
 [dependencies]
-near-sdk = { path = "../near-sdk", version = "=4.0.0-pre.7" }
+near-sdk = { path = "../near-sdk", version = "=4.0.0-pre.8" }
 serde = "1"
 serde_json = "1"
diff --git a/near-sdk-macros/Cargo.toml b/near-sdk-macros/Cargo.toml
index 683fcb450..c0248eff0 100644
--- a/near-sdk-macros/Cargo.toml
+++ b/near-sdk-macros/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "near-sdk-macros"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 authors = ["Near Inc <max@nearprotocol.com>"]
 edition = "2018"
 license = "MIT OR Apache-2.0"
diff --git a/near-sdk-sim/Cargo.toml b/near-sdk-sim/Cargo.toml
index 198fc96d0..6488de965 100644
--- a/near-sdk-sim/Cargo.toml
+++ b/near-sdk-sim/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "near-sdk-sim"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 authors = ["Near Inc <hello@near.org>"]
 edition = "2018"
 license = "GPL-3.0"
@@ -13,7 +13,7 @@ NEAR Simulator & cross-contract testing library
 
 
 [dependencies]
-near-sdk = { path = "../near-sdk", version = "=4.0.0-pre.7" }
+near-sdk = { path = "../near-sdk", version = "=4.0.0-pre.8" }
 near-crypto = "=0.1.0"
 near-primitives = "=0.1.0-pre.1"
 near-vm-logic = "=4.0.0-pre.1"
diff --git a/near-sdk-sim/README.md b/near-sdk-sim/README.md
index 9e6b48c4f..a6895b1ef 100644
--- a/near-sdk-sim/README.md
+++ b/near-sdk-sim/README.md
@@ -31,7 +31,7 @@ Currently this crate depends on a the GitHub repo of [nearcore](https://github.c
 
 ```toml
 [dev-dependencies]
-near-sdk-sim = "4.0.0-pre.6"
+near-sdk-sim = "4.0.0-pre.8"
 
 ```
 
@@ -39,7 +39,7 @@ And update `near-sdk` too:
 
 ```toml
 [dependencies]
-near-sdk = "4.0.0-pre.6"
+near-sdk = "4.0.0-pre.8"
 
 ```
 
@@ -64,8 +64,8 @@ Now in the root of the project (`contract-wrap`), create a new `Cargo.toml`. You
 
 ```toml
 [dev-dependencies]
-near-sdk = "4.0.0-pre.6"
-near-sdk-sim = "4.0.0-pre.6"
+near-sdk = "4.0.0-pre.8"
+near-sdk-sim = "4.0.0-pre.8"
 contract = { path = "./contract" }
 
 [workspace]
diff --git a/near-sdk/Cargo.toml b/near-sdk/Cargo.toml
index 82f06fe1e..c064ff82d 100644
--- a/near-sdk/Cargo.toml
+++ b/near-sdk/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "near-sdk"
-version = "4.0.0-pre.7"
+version = "4.0.0-pre.8"
 authors = ["Near Inc <max@nearprotocol.com>"]
 edition = "2018"
 license = "GPL-3.0"
@@ -20,7 +20,7 @@ path = "compilation_tests/all.rs"
 # Provide near_bidgen macros.
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
-near-sdk-macros = { path = "../near-sdk-macros", version = "=4.0.0-pre.7" }
+near-sdk-macros = { path = "../near-sdk-macros", version = "=4.0.0-pre.8" }
 near-sys = { path = "../sys", version = "0.1" }
 base64 = "0.13"
 borsh = "0.9"