diff --git a/Cargo.lock b/Cargo.lock
index 13692c2..27d405d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -310,7 +310,7 @@ dependencies = [
 
 [[package]]
 name = "canton-proto-rs"
-version = "3.4.0"
+version = "3.5.3"
 dependencies = [
  "prost",
  "prost-types",
@@ -374,7 +374,7 @@ checksum = "b05b61dc5112cbb17e4b6cd61790d9845d13888356391624cbe7e41efeac1e75"
 
 [[package]]
 name = "common"
-version = "0.6.0"
+version = "0.6.1"
 dependencies = [
  "canton-api-client",
  "rust_decimal",
@@ -420,7 +420,7 @@ dependencies = [
 
 [[package]]
 name = "cryptography"
-version = "0.6.0"
+version = "0.6.1"
 dependencies = [
  "aes-gcm",
  "base64",
@@ -575,7 +575,7 @@ dependencies = [
 
 [[package]]
 name = "examples"
-version = "0.6.0"
+version = "0.6.1"
 dependencies = [
  "common",
  "dotenvy",
@@ -1165,7 +1165,7 @@ dependencies = [
 
 [[package]]
 name = "keycloak"
-version = "0.6.0"
+version = "0.6.1"
 dependencies = [
  "base64",
  "reqwest 0.12.24",
@@ -1175,7 +1175,7 @@ dependencies = [
 
 [[package]]
 name = "ledger"
-version = "0.6.0"
+version = "0.6.1"
 dependencies = [
  "base64",
  "canton-api-client",
@@ -1727,7 +1727,7 @@ checksum = "7a2d987857b319362043e95f5353c0535c1f58eec5336fdfcf626430af7def58"
 
 [[package]]
 name = "registry"
-version = "0.6.0"
+version = "0.6.1"
 dependencies = [
  "chrono",
  "common",
@@ -2740,7 +2740,7 @@ dependencies = [
 
 [[package]]
 name = "wallet"
-version = "0.6.0"
+version = "0.6.1"
 dependencies = [
  "chrono",
  "common",
diff --git a/Cargo.toml b/Cargo.toml
index 8cb1ec5..d6d7ed4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -14,7 +14,7 @@ resolver = "2"
 [workspace.package]
 edition = "2024"
 license = "MIT"
-version = "0.6.0"
+version = "0.6.1"
 
 [profile.release]
 opt-level = 3
diff --git a/crates/ledgrpc/Cargo.toml b/crates/ledgrpc/Cargo.toml
index fefb602..555a044 100644
--- a/crates/ledgrpc/Cargo.toml
+++ b/crates/ledgrpc/Cargo.toml
@@ -2,7 +2,7 @@
 name = "canton-proto-rs"
 edition.workspace = true
 license.workspace = true
-version = "3.4.0"
+version = "3.5.3"
 
 [dependencies]
 prost = { version = "0.14.1" }
diff --git a/crates/ledgrpc/proto/admin-api/com/digitalasset/canton/admin/participant/v30/party_management_service.proto b/crates/ledgrpc/proto/admin-api/com/digitalasset/canton/admin/participant/v30/party_management_service.proto
index 03ae257..692fa82 100644
--- a/crates/ledgrpc/proto/admin-api/com/digitalasset/canton/admin/participant/v30/party_management_service.proto
+++ b/crates/ledgrpc/proto/admin-api/com/digitalasset/canton/admin/participant/v30/party_management_service.proto
@@ -276,9 +276,13 @@ message ImportPartyAcsRequest {
   // Required
   bytes acs_snapshot = 1;
 
+  // The identifier of the synchronizer the imported contracts are assigned to.
+  // Required (Canton 3.5+).
+  optional string synchronizer_id = 2;
+
   // Custom prefix for the workflow ID to easily identify all transactions generated by this import.
   // Optional. If left empty, the service will generate a prefix such as `import-<random_UUID>`.
-  string workflow_id_prefix = 2;
+  optional string workflow_id_prefix = 3;
 
   // How imported contracts should be validated upon import.
   //
@@ -289,12 +293,16 @@ message ImportPartyAcsRequest {
   // that the assigned representative package IDs correctly validate the imported contracts.
   //
   // Required
-  ContractImportMode contract_import_mode = 3;
+  optional ContractImportMode contract_import_mode = 4;
 
   // The representative package ID override rules to be applied during import.
   //
   // Optional
-  RepresentativePackageIdOverride representative_package_id_override = 4;
+  optional RepresentativePackageIdOverride representative_package_id_override = 5;
+
+  // The party whose ACS is being imported.
+  // Required (Canton 3.5+).
+  optional string party_id = 6;
 }
 
 message ImportPartyAcsResponse {}