diff --git a/Cargo.lock b/Cargo.lock
index 7cd923f..a3f690c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -373,7 +373,7 @@ dependencies = [
  "glob-match",
  "graphql-parser",
  "graphql_client",
- "ndc-sdk",
+ "ndc-models",
  "reqwest 0.12.7",
  "schemars",
  "serde",
@@ -956,9 +956,9 @@ dependencies = [
 
 [[package]]
 name = "hyper-util"
-version = "0.1.8"
+version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "da62f120a8a37763efb0cf8fdf264b884c7b8b9ac8660b900c8661030c00e6ba"
+checksum = "41296eb09f183ac68eec06e03cdbea2e759633d4067b2f6552fc2e009bcad08b"
 dependencies = [
  "bytes",
  "futures-channel",
@@ -969,7 +969,6 @@ dependencies = [
  "pin-project-lite",
  "socket2",
  "tokio",
- "tower",
  "tower-service",
  "tracing",
 ]
@@ -1221,7 +1220,7 @@ dependencies = [
  "graphql-parser",
  "graphql_client",
  "insta",
- "ndc-sdk",
+ "ndc-models",
  "schemars",
  "serde",
  "serde_json",
diff --git a/crates/common/Cargo.toml b/crates/common/Cargo.toml
index 1158a26..1b2c1df 100644
--- a/crates/common/Cargo.toml
+++ b/crates/common/Cargo.toml
@@ -8,10 +8,8 @@ async-trait = "0.1.78"
 glob-match = "0.2.1"
 graphql_client = "0.14.0"
 graphql-parser = "0.4.0"
-ndc-sdk = { git = "https://github.com/hasura/ndc-sdk-rs", tag = "v0.1.5", package = "ndc-sdk", features = [
-    "rustls",
-], default-features = false }
-reqwest = { version = "0.12.3", features = [
+ndc-models = { git = "http://github.com/hasura/ndc-spec.git", tag = "v0.1.4" }
+reqwest = { version = "0.12.7", features = [
     "json",
     "rustls-tls",
 ], default-features = false }
diff --git a/crates/common/src/capabilities_response.rs b/crates/common/src/capabilities_response.rs
index b7151da..753d09a 100644
--- a/crates/common/src/capabilities_response.rs
+++ b/crates/common/src/capabilities_response.rs
@@ -1,4 +1,4 @@
-use ndc_sdk::models;
+use ndc_models as models;
 
 pub fn capabilities_response() -> models::CapabilitiesResponse {
     models::CapabilitiesResponse {
diff --git a/crates/common/src/schema_response.rs b/crates/common/src/schema_response.rs
index 2a5e068..138ca66 100644
--- a/crates/common/src/schema_response.rs
+++ b/crates/common/src/schema_response.rs
@@ -5,7 +5,7 @@ use crate::config::{
     },
     RequestConfig, ResponseConfig,
 };
-use ndc_sdk::models;
+use ndc_models as models;
 use std::{collections::BTreeMap, iter};
 
 pub fn schema_response(
diff --git a/crates/ndc-graphql-cli/Cargo.toml b/crates/ndc-graphql-cli/Cargo.toml
index ed522e7..4f07c6e 100644
--- a/crates/ndc-graphql-cli/Cargo.toml
+++ b/crates/ndc-graphql-cli/Cargo.toml
@@ -9,9 +9,7 @@ common = { path = "../common" }
 graphql_client = "0.14.0"
 graphql-introspection-query = "0.2.0"
 graphql-parser = "0.4.0"
-ndc-sdk = { git = "https://github.com/hasura/ndc-sdk-rs", tag = "v0.1.5", package = "ndc-sdk", features = [
-    "rustls",
-], default-features = false }
+ndc-models = { git = "http://github.com/hasura/ndc-spec.git", tag = "v0.1.4" }
 schemars = "0.8.16"
 serde = { version = "1.0.197", features = ["derive"] }
 serde_json = "1.0.114"
diff --git a/crates/ndc-graphql-cli/src/main.rs b/crates/ndc-graphql-cli/src/main.rs
index 84c27ae..4d6e7a0 100644
--- a/crates/ndc-graphql-cli/src/main.rs
+++ b/crates/ndc-graphql-cli/src/main.rs
@@ -14,7 +14,7 @@ use common::{
 use graphql::{execute_graphql_introspection, schema_from_introspection};
 use graphql_parser::schema;
 use ndc_graphql_cli::graphql;
-use ndc_sdk::models;
+use ndc_models as models;
 use schemars::schema_for;
 use serde::Serialize;
 use std::{