diff --git a/CMakeLists.txt b/CMakeLists.txt
index dbac3a0..8d289be 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -25,7 +25,7 @@ cmake_minimum_required(VERSION 3.3 FATAL_ERROR)
 
 project(kaldi-native-fbank CXX C)
 
-set(KALDI_NATIVE_FBANK_VERSION "1.19.3")
+set(KALDI_NATIVE_FBANK_VERSION "1.20.0")
 
 # Disable warning about
 #
diff --git a/kaldi-native-fbank/csrc/whisper-feature.cc b/kaldi-native-fbank/csrc/whisper-feature.cc
index e8ae5a2..1b69984 100644
--- a/kaldi-native-fbank/csrc/whisper-feature.cc
+++ b/kaldi-native-fbank/csrc/whisper-feature.cc
@@ -19,11 +19,11 @@
 #include "kaldi-native-fbank/csrc/whisper-feature.h"
 
 #include <cmath>
-#include <vector>
 #include <string>
+#include <vector>
 
-#include "kaldi-native-fbank/csrc/mel-computations.h"
 #include "kaldi-native-fbank/csrc/log.h"
+#include "kaldi-native-fbank/csrc/mel-computations.h"
 
 #ifndef M_2PI
 #define M_2PI 6.283185307179586476925286766559005
@@ -31,6 +31,14 @@
 
 namespace knf {
 
+std::string WhisperFeatureOptions::ToString() const {
+  std::ostringstream os;
+  os << "WhisperFeatureOptions(";
+  os << "frame_opts=" << frame_opts.ToString() << ", ";
+  os << "dim=" << dim << ")";
+  return os.str();
+}
+
 static void dft(const std::vector<float> &in, std::vector<float> *out) {
   // this function is modified from
   // https://github.com/ggerganov/whisper.cpp/blob/master/whisper.cpp#L2353
@@ -116,23 +124,24 @@ static void fft(const std::vector<float> &in, std::vector<float> *out) {
 }
 
 WhisperFeatureComputer::WhisperFeatureComputer(
-    const FrameExtractionOptions & /*unused={}*/) {
-  frame_opts_.samp_freq = 16000;
-  frame_opts_.frame_shift_ms = 10;
-  frame_opts_.frame_length_ms = 25;
-  frame_opts_.dither = 0;
-  frame_opts_.preemph_coeff = 0;
-  frame_opts_.remove_dc_offset = false;
-  frame_opts_.window_type = "hann";
-  frame_opts_.round_to_power_of_two = false;
-  frame_opts_.snip_edges = false;
+    const WhisperFeatureOptions &opts /*= {}*/)
+    : opts_(opts) {
+  opts_.frame_opts.samp_freq = 16000;
+  opts_.frame_opts.frame_shift_ms = 10;
+  opts_.frame_opts.frame_length_ms = 25;
+  opts_.frame_opts.dither = 0;
+  opts_.frame_opts.preemph_coeff = 0;
+  opts_.frame_opts.remove_dc_offset = false;
+  opts_.frame_opts.window_type = "hann";
+  opts_.frame_opts.round_to_power_of_two = false;
+  opts_.frame_opts.snip_edges = false;
 
   MelBanksOptions mel_opts;
-  mel_opts.num_bins = 80;
+  mel_opts.num_bins = opts_.dim;
   mel_opts.low_freq = 0;
   mel_opts.is_librosa = true;
 
-  mel_banks_ = std::make_unique<MelBanks>(mel_opts, frame_opts_, 1.0f);
+  mel_banks_ = std::make_unique<MelBanks>(mel_opts, opts_.frame_opts, 1.0f);
 }
 
 void WhisperFeatureComputer::Compute(float /*signal_raw_log_energy*/,
diff --git a/kaldi-native-fbank/csrc/whisper-feature.h b/kaldi-native-fbank/csrc/whisper-feature.h
index 033bd7c..8ada4bd 100644
--- a/kaldi-native-fbank/csrc/whisper-feature.h
+++ b/kaldi-native-fbank/csrc/whisper-feature.h
@@ -19,23 +19,36 @@
 #ifndef KALDI_NATIVE_FBANK_CSRC_WHISPER_FEATURE_H_
 #define KALDI_NATIVE_FBANK_CSRC_WHISPER_FEATURE_H_
 
+#include <cstdint>
 #include <memory>
 #include <vector>
-#include <cstdint>
 
 #include "kaldi-native-fbank/csrc/feature-window.h"
 #include "kaldi-native-fbank/csrc/mel-computations.h"
 
 namespace knf {
 
+struct WhisperFeatureOptions {
+  WhisperFeatureOptions(const FrameExtractionOptions &frame_opts = {},
+                        int32_t dim = 80)
+      : frame_opts(frame_opts), dim(dim) {}
+
+  FrameExtractionOptions frame_opts;
+  int32_t dim = 80;
+
+  std::string ToString() const;
+};
+
 class WhisperFeatureComputer {
  public:
-  explicit WhisperFeatureComputer(
-      const FrameExtractionOptions &unused_frame_opts_ = {});
+  // note: opts.frame_opts is ignored and we reset it inside
+  explicit WhisperFeatureComputer(const WhisperFeatureOptions &opts = {});
 
-  int32_t Dim() const { return 80; }
+  int32_t Dim() const { return opts_.dim; }
 
-  const FrameExtractionOptions &GetFrameOptions() const { return frame_opts_; }
+  const FrameExtractionOptions &GetFrameOptions() const {
+    return opts_.frame_opts;
+  }
 
   void Compute(float /*signal_raw_log_energy*/, float /*vtln_warp*/,
                std::vector<float> *signal_frame, float *feature);
@@ -43,11 +56,11 @@ class WhisperFeatureComputer {
   // if true, compute log_energy_pre_window but after dithering and dc removal
   bool NeedRawLogEnergy() const { return false; }
 
-  using Options = FrameExtractionOptions;
+  using Options = WhisperFeatureOptions;
 
  private:
   std::unique_ptr<MelBanks> mel_banks_;
-  FrameExtractionOptions frame_opts_;
+  WhisperFeatureOptions opts_;
 };
 
 }  // namespace knf
diff --git a/kaldi-native-fbank/python/csrc/online-feature.cc b/kaldi-native-fbank/python/csrc/online-feature.cc
index d0bb0ec..b650c13 100644
--- a/kaldi-native-fbank/python/csrc/online-feature.cc
+++ b/kaldi-native-fbank/python/csrc/online-feature.cc
@@ -26,6 +26,7 @@
 #include "kaldi-native-fbank/csrc/feature-mfcc.h"
 #include "kaldi-native-fbank/csrc/online-feature.h"
 #include "kaldi-native-fbank/csrc/whisper-feature.h"
+#include "kaldi-native-fbank/python/csrc/utils.h"
 
 namespace pybind11 {
 class gil_scoped_release;
@@ -33,6 +34,27 @@ class gil_scoped_release;
 
 namespace knf {
 
+static void PybindWhisperFeatureOptions(py::module &m) {  // NOLINT
+  using PyClass = WhisperFeatureOptions;
+  py::class_<PyClass>(m, "WhisperFeatureOptions")
+      .def(py::init<>())
+      .def_readwrite("frame_opts", &PyClass::frame_opts)
+      .def_readwrite("dim", &PyClass::dim)
+      .def("__str__",
+           [](const PyClass &self) -> std::string { return self.ToString(); })
+      .def("as_dict",
+           [](const PyClass &self) -> py::dict { return AsDict(self); })
+      .def_static("from_dict",
+                  [](py::dict dict) -> PyClass {
+                    return WhisperFeatureOptionsFromDict(dict);
+                  })
+      .def(py::pickle(
+          [](const PyClass &self) -> py::dict { return AsDict(self); },
+          [](py::dict dict) -> PyClass {
+            return WhisperFeatureOptionsFromDict(dict);
+          }));
+}
+
 template <typename C>
 void PybindOnlineFeatureTpl(py::module &m,  // NOLINT
                             const std::string &class_name,
@@ -76,6 +98,9 @@ void PybindOnlineFeatureTpl(py::module &m,  // NOLINT
 void PybindOnlineFeature(py::module &m) {  // NOLINT
   PybindOnlineFeatureTpl<FbankComputer>(m, "OnlineFbank");
   PybindOnlineFeatureTpl<MfccComputer>(m, "OnlineMfcc");
+
+  PybindWhisperFeatureOptions(m);
+
   PybindOnlineFeatureTpl<WhisperFeatureComputer>(m, "OnlineWhisperFbank");
 }
 
diff --git a/kaldi-native-fbank/python/csrc/utils.cc b/kaldi-native-fbank/python/csrc/utils.cc
index d7e259b..3a5cc40 100644
--- a/kaldi-native-fbank/python/csrc/utils.cc
+++ b/kaldi-native-fbank/python/csrc/utils.cc
@@ -23,6 +23,7 @@
 #include "kaldi-native-fbank/csrc/feature-fbank.h"
 #include "kaldi-native-fbank/csrc/feature-mfcc.h"
 #include "kaldi-native-fbank/csrc/feature-window.h"
+#include "kaldi-native-fbank/csrc/whisper-feature.h"
 
 #define FROM_DICT(type, key)         \
   if (dict.contains(#key)) {         \
@@ -82,6 +83,7 @@ MelBanksOptions MelBanksOptionsFromDict(py::dict dict) {
 
   return opts;
 }
+
 py::dict AsDict(const MelBanksOptions &opts) {
   py::dict dict;
 
@@ -170,6 +172,27 @@ py::dict AsDict(const MfccOptions &opts) {
   return dict;
 }
 
+WhisperFeatureOptions WhisperFeatureOptionsFromDict(py::dict dict) {
+  WhisperFeatureOptions opts;
+
+  if (dict.contains("frame_opts")) {
+    opts.frame_opts = FrameExtractionOptionsFromDict(dict["frame_opts"]);
+  }
+
+  FROM_DICT(int_, dim);
+
+  return opts;
+}
+
+py::dict AsDict(const WhisperFeatureOptions &opts) {
+  py::dict dict;
+
+  dict["frame_opts"] = AsDict(opts.frame_opts);
+  AS_DICT(dim);
+
+  return dict;
+}
+
 #undef FROM_DICT
 #undef AS_DICT
 
diff --git a/kaldi-native-fbank/python/csrc/utils.h b/kaldi-native-fbank/python/csrc/utils.h
index c273c85..ab6bee1 100644
--- a/kaldi-native-fbank/python/csrc/utils.h
+++ b/kaldi-native-fbank/python/csrc/utils.h
@@ -23,6 +23,7 @@
 #include "kaldi-native-fbank/csrc/feature-mfcc.h"
 #include "kaldi-native-fbank/csrc/feature-window.h"
 #include "kaldi-native-fbank/csrc/mel-computations.h"
+#include "kaldi-native-fbank/csrc/whisper-feature.h"
 #include "kaldi-native-fbank/python/csrc/kaldi-native-fbank.h"
 
 /*
@@ -51,6 +52,9 @@ py::dict AsDict(const FbankOptions &opts);
 MfccOptions MfccOptionsFromDict(py::dict dict);
 py::dict AsDict(const MfccOptions &opts);
 
+WhisperFeatureOptions WhisperFeatureOptionsFromDict(py::dict dict);
+py::dict AsDict(const WhisperFeatureOptions &opts);
+
 }  // namespace knf
 
 #endif  // KALDI_NATIVE_FBANK_PYTHON_CSRC_UTILS_H_
diff --git a/kaldi-native-fbank/python/kaldi_native_fbank/__init__.py b/kaldi-native-fbank/python/kaldi_native_fbank/__init__.py
index d0b92f0..d336426 100644
--- a/kaldi-native-fbank/python/kaldi_native_fbank/__init__.py
+++ b/kaldi-native-fbank/python/kaldi_native_fbank/__init__.py
@@ -8,4 +8,5 @@
     OnlineMfcc,
     OnlineWhisperFbank,
     Rfft,
+    WhisperFeatureOptions,
 )
diff --git a/kaldi-native-fbank/python/tests/test_online_whisper_fbank.py b/kaldi-native-fbank/python/tests/test_online_whisper_fbank.py
index b170b9d..5219f4a 100755
--- a/kaldi-native-fbank/python/tests/test_online_whisper_fbank.py
+++ b/kaldi-native-fbank/python/tests/test_online_whisper_fbank.py
@@ -9,7 +9,10 @@
 
 
 def test():
-    opts = knf.FrameExtractionOptions()
+    opts = knf.WhisperFeatureOptions()
+
+    # Use 128 for whisper large v3
+    opts.dim = 128
     online_whisper_fbank = knf.OnlineWhisperFbank(opts)
 
     audio = torch.rand(100000)
@@ -36,7 +39,7 @@ def test():
     mel = mel.t().unsqueeze(0)
     print(mel.shape)
 
-    assert mel.shape == (1, 80, 3000), mel.shape
+    assert mel.shape == (1, opts.dim, 3000), mel.shape
     # Now you can input 'mel' to whisper.encoder model