diff --git a/WORKSPACE b/WORKSPACE
index 87ec4c9..3963be9 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -37,7 +37,7 @@ load("@org_tensorflow//tensorflow:workspace0.bzl", "tf_workspace0")
 tf_workspace0()
 
 load("@coral_crosstool//:configure.bzl", "cc_crosstool")
-cc_crosstool(name = "crosstool", cpp_version = "c++14")
+cc_crosstool(name = "crosstool", cpp_version = "c++17")
 
 # External Dependencies
 http_archive(
diff --git a/coral/detection/adapter.cc b/coral/detection/adapter.cc
index 785443f..00a93e9 100644
--- a/coral/detection/adapter.cc
+++ b/coral/detection/adapter.cc
@@ -78,11 +78,12 @@ std::vector<Object> GetDetectionResults(const tflite::Interpreter& interpreter,
   // If a model has signature, we use the signature output tensor names to parse
   // the results. Otherwise, we parse the results based on some assumption of
   // the output tensor order and size.
-  if (!interpreter.signature_def_names().empty()) {
-    CHECK_EQ(interpreter.signature_def_names().size(), 1);
-    VLOG(1) << "Signature name: " << *interpreter.signature_def_names()[0];
+  const auto interpreter_signature_keys = interpreter.signature_keys();
+  if (!interpreter_signature_keys.empty()) {
+    CHECK_EQ(interpreter_signature_keys.size(), 1);
+    VLOG(1) << "Signature name: " << *interpreter_signature_keys[0];
     const auto& signature_output_map = interpreter.signature_outputs(
-        interpreter.signature_def_names()[0]->c_str());
+        interpreter_signature_keys[0]->c_str());
     CHECK_EQ(signature_output_map.size(), 4);
     count = TensorData<float>(
         *interpreter.tensor(signature_output_map.at("output_0")));
diff --git a/coral/learn/backprop/layers.cc b/coral/learn/backprop/layers.cc
index 59cfd2f..599c92f 100644
--- a/coral/learn/backprop/layers.cc
+++ b/coral/learn/backprop/layers.cc
@@ -40,7 +40,7 @@ MatrixXf CrossEntropyGradient(const MatrixXf& c, const MatrixXf& p) {
 MatrixXf FullyConnected(const MatrixXf& mat_x, const MatrixXf& mat_w,
                         const MatrixXf& mat_b) {
   MatrixXf mat_y = mat_x * mat_w;
-  mat_y.array().rowwise() += mat_b.array()(0, Eigen::all);
+  mat_y.array().rowwise() += mat_b.array()(0, Eigen::indexing::all);
   return mat_y;
 }
 
diff --git a/coral/pipeline/internal/segment_runner.cc b/coral/pipeline/internal/segment_runner.cc
index b8c4791..1ce3035 100644
--- a/coral/pipeline/internal/segment_runner.cc
+++ b/coral/pipeline/internal/segment_runner.cc
@@ -24,20 +24,6 @@ limitations under the License.
 namespace coral {
 namespace internal {
 namespace {
-TfLiteFloatArray* TfLiteFloatArrayCopy(const TfLiteFloatArray* src) {
-  if (!src) {
-    return nullptr;
-  }
-  TfLiteFloatArray* ret = static_cast<TfLiteFloatArray*>(
-      std::malloc(TfLiteFloatArrayGetSizeInBytes(src->size)));
-  if (!ret) {
-    return nullptr;
-  }
-  ret->size = src->size;
-  std::memcpy(ret->data, src->data, src->size * sizeof(float));
-  return ret;
-}
-
 void DmaDelegateFreeBufferHandle(TfLiteContext* context,
                                  struct TfLiteDelegate* delegate,
                                  TfLiteBufferHandle* handle) {
diff --git a/coral/tflite_utils.cc b/coral/tflite_utils.cc
index 646ee35..d81f572 100644
--- a/coral/tflite_utils.cc
+++ b/coral/tflite_utils.cc
@@ -28,17 +28,6 @@ limitations under the License.
 
 namespace coral {
 namespace {
-TfLiteFloatArray* TfLiteFloatArrayCopy(const TfLiteFloatArray* src) {
-  if (!src) return nullptr;
-
-  auto* copy = static_cast<TfLiteFloatArray*>(
-      malloc(TfLiteFloatArrayGetSizeInBytes(src->size)));
-  CHECK(copy);
-  copy->size = src->size;
-  std::memcpy(copy->data, src->data, src->size * sizeof(float));
-  return copy;
-}
-
 TfLiteAffineQuantization* TfLiteAffineQuantizationCopy(
     const TfLiteAffineQuantization* src) {
   if (!src) return nullptr;