diff --git a/Cargo.lock b/Cargo.lock
index eaf42c45..30dd2087 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -987,7 +987,7 @@ dependencies = [
 [[package]]
 name = "ndc-client"
 version = "0.1.0"
-source = "git+http://github.com/hasura/ndc-spec.git?tag=v0.1.0-rc.5#0842f61fc5e29d19994ff3439abb8d7eabc28449"
+source = "git+http://github.com/hasura/ndc-spec.git?tag=v0.1.0-rc.6#af2a6fa447617850ac0600f81dbe29b664f010cf"
 dependencies = [
  "async-trait",
  "indexmap 1.9.3",
@@ -1036,7 +1036,7 @@ dependencies = [
 [[package]]
 name = "ndc-test"
 version = "0.1.0"
-source = "git+http://github.com/hasura/ndc-spec.git?tag=v0.1.0-rc.5#0842f61fc5e29d19994ff3439abb8d7eabc28449"
+source = "git+http://github.com/hasura/ndc-spec.git?tag=v0.1.0-rc.6#af2a6fa447617850ac0600f81dbe29b664f010cf"
 dependencies = [
  "async-trait",
  "clap",
diff --git a/rust-connector-sdk/Cargo.toml b/rust-connector-sdk/Cargo.toml
index e4eeae48..7aa786d8 100644
--- a/rust-connector-sdk/Cargo.toml
+++ b/rust-connector-sdk/Cargo.toml
@@ -16,8 +16,8 @@ async-trait = "^0.1.68"
 axum = "^0.6.18"
 axum-macros = "^0.3.7"
 clap = { version = "^4.3.9", features = ["derive", "env"] }
-ndc-client = { git = "http://github.com/hasura/ndc-spec.git", tag = "v0.1.0-rc.5" }
-ndc-test = { git = "http://github.com/hasura/ndc-spec.git", tag = "v0.1.0-rc.5" }
+ndc-client = { git = "http://github.com/hasura/ndc-spec.git", tag = "v0.1.0-rc.6" }
+ndc-test = { git = "http://github.com/hasura/ndc-spec.git", tag = "v0.1.0-rc.6" }
 opentelemetry = { version = "^0.20", features = [
   "rt-tokio",
   "trace",