diff --git a/Cargo.lock b/Cargo.lock
index d698a14615e..f837d6d45ad 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2388,6 +2388,27 @@ dependencies = [
  "ctutils",
 ]
 
+[[package]]
+name = "dirs"
+version = "6.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c3e8aa94d75141228480295a7d0e7feb620b1a5ad9f12bc40be62411e38cce4e"
+dependencies = [
+ "dirs-sys",
+]
+
+[[package]]
+name = "dirs-sys"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e01a3366d27ee9890022452ee61b2b63a67e6f13f58900b651ff5665f0bb1fab"
+dependencies = [
+ "libc",
+ "option-ext",
+ "redox_users",
+ "windows-sys 0.59.0",
+]
+
 [[package]]
 name = "dispatch2"
 version = "0.3.1"
@@ -2877,6 +2898,16 @@ version = "0.5.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1d674e81391d1e1ab681a28d99df07927c6d4aa5b027d7da16ba32d1d21ecd99"
 
+[[package]]
+name = "flate2"
+version = "1.0.35"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c936bfdafb507ebbf50b8074c54fa31c5be9a1e7e5f467dd659697041407d07c"
+dependencies = [
+ "crc32fast",
+ "miniz_oxide",
+]
+
 [[package]]
 name = "fnv"
 version = "1.0.7"
@@ -4011,7 +4042,7 @@ dependencies = [
  "serde_json",
  "simple-mermaid",
  "temporalio-client",
- "temporalio-common",
+ "temporalio-common 0.1.0",
  "thiserror 2.0.18",
  "tracing",
  "tracing-opentelemetry",
@@ -6724,6 +6755,12 @@ dependencies = [
  "tokio-stream",
 ]
 
+[[package]]
+name = "option-ext"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "04744f49eae99ab78e0d5c0b603ab218f515ea8cfe5a456d7629ad883a3b6e7d"
+
 [[package]]
 name = "ordered-float"
 version = "2.10.1"
@@ -7128,6 +7165,28 @@ dependencies = [
  "camino",
 ]
 
+[[package]]
+name = "pbjson"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e8edd1efdd8ab23ba9cb9ace3d9987a72663d5d7c9f74fa00b51d6213645cf6c"
+dependencies = [
+ "base64",
+ "serde",
+]
+
+[[package]]
+name = "pbjson-build"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2ed4d5c6ae95e08ac768883c8401cf0e8deb4e6e1d6a4e1fd3d2ec4f0ec63200"
+dependencies = [
+ "heck",
+ "itertools 0.14.0",
+ "prost 0.14.4",
+ "prost-types",
+]
+
 [[package]]
 name = "pem"
 version = "3.0.6"
@@ -8161,6 +8220,17 @@ dependencies = [
  "bitflags 2.13.0",
 ]
 
+[[package]]
+name = "redox_users"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4e608c6638b9c18977b00b475ac1f28d14e84b27d8d42f70e0bf1e3dec127ac"
+dependencies = [
+ "getrandom 0.2.17",
+ "libredox",
+ "thiserror 2.0.18",
+]
+
 [[package]]
 name = "ref-cast"
 version = "1.0.25"
@@ -9174,15 +9244,6 @@ version = "0.4.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0c790de23124f9ab44544d7ac05d60440adc586479ce501c1d6d7da3cd8c9cf5"
 
-[[package]]
-name = "slotmap"
-version = "1.1.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bdd58c3c93c3d278ca835519292445cb4b0d4dc59ccfdf7ceadaab3f8aeb4038"
-dependencies = [
- "version_check",
-]
-
 [[package]]
 name = "smallvec"
 version = "1.15.2"
@@ -9666,8 +9727,8 @@ dependencies = [
 
 [[package]]
 name = "temporalio-client"
-version = "0.1.0"
-source = "git+https://github.com/temporalio/sdk-core?rev=231e21c#231e21cadb8004197a5b1dba2ecb1313596cc34c"
+version = "0.4.0"
+source = "git+https://github.com/temporalio/sdk-core?rev=4cbf147a41e9a1cbdd1d477a22bfba87e595b407#4cbf147a41e9a1cbdd1d477a22bfba87e595b407"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -9684,11 +9745,11 @@ dependencies = [
  "hyper",
  "hyper-util",
  "parking_lot",
- "rand 0.9.4",
- "slotmap",
- "temporalio-common",
+ "rand 0.10.1",
+ "temporalio-common 0.4.0",
  "thiserror 2.0.18",
  "tokio",
+ "tokio-rustls",
  "tonic 0.14.6",
  "tower",
  "tracing",
@@ -9721,6 +9782,82 @@ dependencies = [
  "uuid",
 ]
 
+[[package]]
+name = "temporalio-common"
+version = "0.4.0"
+source = "git+https://github.com/temporalio/sdk-core?rev=4cbf147a41e9a1cbdd1d477a22bfba87e595b407#4cbf147a41e9a1cbdd1d477a22bfba87e595b407"
+dependencies = [
+ "anyhow",
+ "async-trait",
+ "bon",
+ "crc32fast",
+ "derive_more",
+ "dirs",
+ "erased-serde",
+ "futures",
+ "parking_lot",
+ "prost 0.14.4",
+ "prost-types",
+ "serde",
+ "serde_json",
+ "temporalio-common-wasm",
+ "temporalio-protos",
+ "thiserror 2.0.18",
+ "toml",
+ "tonic 0.14.6",
+ "tracing",
+ "tracing-core",
+ "tracing-subscriber",
+ "url",
+ "uuid",
+]
+
+[[package]]
+name = "temporalio-common-wasm"
+version = "0.4.0"
+source = "git+https://github.com/temporalio/sdk-core?rev=4cbf147a41e9a1cbdd1d477a22bfba87e595b407#4cbf147a41e9a1cbdd1d477a22bfba87e595b407"
+dependencies = [
+ "anyhow",
+ "async-trait",
+ "bon",
+ "crc32fast",
+ "derive_more",
+ "erased-serde",
+ "futures",
+ "parking_lot",
+ "prost 0.14.4",
+ "serde",
+ "serde_json",
+ "temporalio-protos",
+ "thiserror 2.0.18",
+ "tracing",
+ "tracing-core",
+ "tracing-subscriber",
+ "url",
+]
+
+[[package]]
+name = "temporalio-protos"
+version = "0.4.0"
+source = "git+https://github.com/temporalio/sdk-core?rev=4cbf147a41e9a1cbdd1d477a22bfba87e595b407#4cbf147a41e9a1cbdd1d477a22bfba87e595b407"
+dependencies = [
+ "anyhow",
+ "base64",
+ "derive_more",
+ "http 1.4.2",
+ "pbjson",
+ "pbjson-build",
+ "prost 0.14.4",
+ "prost-types",
+ "prost-wkt-types",
+ "serde",
+ "serde_json",
+ "thiserror 2.0.18",
+ "tonic 0.14.6",
+ "tonic-prost",
+ "tonic-prost-build",
+]
+
 [[package]]
 name = "term"
 version = "1.2.1"
@@ -10240,6 +10377,7 @@ dependencies = [
  "axum",
  "base64",
  "bytes",
+ "flate2",
  "h2",
  "http 1.4.2",
  "http-body 1.0.1",
@@ -10477,6 +10615,7 @@ dependencies = [
  "matchers",
  "nu-ansi-term",
  "once_cell",
+ "parking_lot",
  "regex-automata",
  "serde",
  "serde_json",
diff --git a/Cargo.toml b/Cargo.toml
index 42b78fb5027..a71b311928a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -255,7 +255,7 @@ supports-unicode                   = { version = "3.0.0", default-features = fal
 syn                                = { version = "2.0.108", default-features = false }
 tachyonix                          = { version = "0.3.1", default-features = false }
 tarpc                              = { version = "0.36.0", default-features = false, git = "https://github.com/google/tarpc", rev = "f55f36d2d876b1868cfcf52f41d0456a60cf726c" }
-temporalio-client                  = { git = "https://github.com/temporalio/sdk-core", rev = "231e21c" }
+temporalio-client                  = { git = "https://github.com/temporalio/sdk-core", rev = "4cbf147a41e9a1cbdd1d477a22bfba87e595b407" }
 temporalio-common                  = { git = "https://github.com/temporalio/sdk-core", rev = "231e21c" }
 test-log                           = { version = "0.2.18", default-features = false }
 test-strategy                      = { version = "0.4.3", default-features = false }