diff --git a/Cargo.lock b/Cargo.lock
index 720e98a60..9743ffbe6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1194,7 +1194,7 @@ dependencies = [
 
 [[package]]
 name = "soroban-ledger-snapshot"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "pretty_assertions",
  "serde",
@@ -1207,7 +1207,7 @@ dependencies = [
 
 [[package]]
 name = "soroban-sdk"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "arbitrary",
  "bytes-lit",
@@ -1231,7 +1231,7 @@ dependencies = [
 
 [[package]]
 name = "soroban-sdk-macros"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "crate-git-revision",
  "darling",
@@ -1249,7 +1249,7 @@ dependencies = [
 
 [[package]]
 name = "soroban-spec"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "base64 0.13.1",
  "pretty_assertions",
@@ -1260,7 +1260,7 @@ dependencies = [
 
 [[package]]
 name = "soroban-spec-rust"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "pretty_assertions",
  "prettyplease",
@@ -1275,7 +1275,7 @@ dependencies = [
 
 [[package]]
 name = "soroban-token-sdk"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "soroban-sdk",
 ]
@@ -1380,133 +1380,133 @@ dependencies = [
 
 [[package]]
 name = "test_account"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "soroban-sdk",
 ]
 
 [[package]]
 name = "test_add_i128"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "soroban-sdk",
 ]
 
 [[package]]
 name = "test_add_u128"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "soroban-sdk",
 ]
 
 [[package]]
 name = "test_add_u64"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "soroban-sdk",
 ]
 
 [[package]]
 name = "test_alloc"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "soroban-sdk",
 ]
 
 [[package]]
 name = "test_auth"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "soroban-sdk",
 ]
 
 [[package]]
 name = "test_contract_data"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "soroban-sdk",
 ]
 
 [[package]]
 name = "test_empty"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "soroban-sdk",
 ]
 
 [[package]]
 name = "test_empty2"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "soroban-sdk",
 ]
 
 [[package]]
 name = "test_errors"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "soroban-sdk",
 ]
 
 [[package]]
 name = "test_events"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "soroban-sdk",
 ]
 
 [[package]]
 name = "test_fuzz"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "soroban-sdk",
 ]
 
 [[package]]
 name = "test_import_contract"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "soroban-sdk",
 ]
 
 [[package]]
 name = "test_invoke_contract"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "soroban-sdk",
 ]
 
 [[package]]
 name = "test_logging"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "soroban-sdk",
 ]
 
 [[package]]
 name = "test_modular"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "soroban-sdk",
 ]
 
 [[package]]
 name = "test_multiimpl"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "soroban-sdk",
 ]
 
 [[package]]
 name = "test_udt"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "soroban-sdk",
 ]
 
 [[package]]
 name = "test_workspace_contract"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "soroban-sdk",
  "test_workspace_lib",
@@ -1514,7 +1514,7 @@ dependencies = [
 
 [[package]]
 name = "test_workspace_lib"
-version = "21.7.2"
+version = "21.7.3"
 dependencies = [
  "soroban-sdk",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index f9c33995a..e07d2c74a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -12,16 +12,16 @@ members = [
 ]
 
 [workspace.package]
-version = "21.7.2"
+version = "21.7.3"
 rust-version = "1.74.0"
 
 [workspace.dependencies]
-soroban-sdk = { version = "21.7.2", path = "soroban-sdk" }
-soroban-sdk-macros = { version = "21.7.2", path = "soroban-sdk-macros" }
-soroban-spec = { version = "21.7.2", path = "soroban-spec" }
-soroban-spec-rust = { version = "21.7.2", path = "soroban-spec-rust" }
-soroban-ledger-snapshot = { version = "21.7.2", path = "soroban-ledger-snapshot" }
-soroban-token-sdk = { version = "21.7.2", path = "soroban-token-sdk" }
+soroban-sdk = { version = "21.7.3", path = "soroban-sdk" }
+soroban-sdk-macros = { version = "21.7.3", path = "soroban-sdk-macros" }
+soroban-spec = { version = "21.7.3", path = "soroban-spec" }
+soroban-spec-rust = { version = "21.7.3", path = "soroban-spec-rust" }
+soroban-ledger-snapshot = { version = "21.7.3", path = "soroban-ledger-snapshot" }
+soroban-token-sdk = { version = "21.7.3", path = "soroban-token-sdk" }
 
 [workspace.dependencies.soroban-env-common]
 version = "=21.2.1"
diff --git a/soroban-sdk/src/lib.rs b/soroban-sdk/src/lib.rs
index c032484ea..bdca8668f 100644
--- a/soroban-sdk/src/lib.rs
+++ b/soroban-sdk/src/lib.rs
@@ -47,6 +47,12 @@
 #[cfg(all(target_family = "wasm", feature = "testutils"))]
 compile_error!("'testutils' feature is not supported on 'wasm' target");
 
+#[cfg(all(target_family = "wasm", target_feature = "reference-types"))]
+compile_error!("Compiler configuration is unsupported by Soroban Environment, because a Wasm target-feature is enabled that is not yet supported: reference-types. Use Rust 1.81 or older to get a compatible default configuration.");
+
+#[cfg(all(target_family = "wasm", target_feature = "multivalue"))]
+compile_error!("Compiler configuration is unsupported by Soroban Environment, because a Wasm target-feature is enabled that is not yet supported: multivalue. Use Rust 1.81 or older to get a compatible default configuration.");
+
 // When used in a no_std contract, provide a panic handler as one is required.
 #[cfg(all(not(feature = "alloc"), target_family = "wasm"))]
 #[panic_handler]