diff --git a/Cargo.lock b/Cargo.lock
index 9f12ccb..453b6c3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -162,9 +162,9 @@ checksum = "19b17cddbe7ec3f8bc800887bab5e717348c95ea2ca0b1bf0837fb964dc67099"
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.50"
+version = "1.0.51"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6ef7d57beacfaf2d8aee5937dab7b7f28de3cb8b1828479bb5de2a7106f2bae2"
+checksum = "5d727cae5b39d21da60fa540906919ad737832fe0b1c165da3a34d6548c849d6"
 dependencies = [
  "unicode-ident",
 ]
@@ -207,7 +207,7 @@ checksum = "43b2853a4d09f215c24cc5489c992ce46052d359b5109343cbafbf26bc62f8a3"
 
 [[package]]
 name = "spirv-to-dxil"
-version = "0.2.2"
+version = "0.2.4"
 dependencies = [
  "bitflags",
  "bytemuck",
diff --git a/spirv-to-dxil/Cargo.toml b/spirv-to-dxil/Cargo.toml
index 6dab2fb..ea2d080 100644
--- a/spirv-to-dxil/Cargo.toml
+++ b/spirv-to-dxil/Cargo.toml
@@ -10,7 +10,7 @@ readme = "../README.md"
 [lib]
 
 [dependencies]
-spirv-to-dxil-sys = { version = "0.2.0", path = "../spirv-to-dxil-sys" }
+spirv-to-dxil-sys = { version = "0.2", path = "../spirv-to-dxil-sys" }
 bitflags = "1.3.2"
 
 [features]
diff --git a/spirv-to-dxil/src/error.rs b/spirv-to-dxil/src/error.rs
new file mode 100644
index 0000000..20974c5
--- /dev/null
+++ b/spirv-to-dxil/src/error.rs
@@ -0,0 +1,4 @@
+pub enum SpirvToDxilError {
+    CompilerError(String),
+    RegisterSpaceOverflow(usize)
+}
\ No newline at end of file
diff --git a/spirv-to-dxil/src/lib.rs b/spirv-to-dxil/src/lib.rs
index d1c7af4..cc5081f 100644
--- a/spirv-to-dxil/src/lib.rs
+++ b/spirv-to-dxil/src/lib.rs
@@ -28,6 +28,10 @@ fn spirv_to_dxil_inner(
     logger: &spirv_to_dxil_sys::dxil_spirv_logger,
     out: &mut MaybeUninit<dxil_spirv_object>,
 ) -> bool {
+    if runtime_conf.push_constant_cbv.register_space > 31
+        || runtime_conf.runtime_data_cbv.register_space > 31 {
+        panic!("register space can not be greater than 31")
+    }
     let num_specializations = specializations.map(|o| o.len()).unwrap_or(0) as u32;
     let mut specializations: Option<Vec<spirv_to_dxil_sys::dxil_spirv_specialization>> =
         specializations.map(|o| o.into_iter().map(|o| (*o).into()).collect());
@@ -158,7 +162,17 @@ mod tests {
                         None, "main",
                         ShaderStage::Fragment,
                         ShaderModel::ShaderModel6_0, ValidatorVersion::None,
-                        RuntimeConfig::default())
+        RuntimeConfig {
+            runtime_data_cbv: ConstantBufferConfig {
+                register_space: 0,
+                base_shader_register: 0,
+            },
+            push_constant_cbv: ConstantBufferConfig {
+                register_space: 128,
+                base_shader_register: 1,
+            },
+            ..RuntimeConfig::default()
+        })
             .expect("failed to compile");
     }