diff --git a/TTS/utils/audio.py b/TTS/utils/audio.py
index 93a5880f..87ae4f5b 100644
--- a/TTS/utils/audio.py
+++ b/TTS/utils/audio.py
@@ -3,7 +3,7 @@ import soundfile as sf
 import numpy as np
 import scipy.io.wavfile
 import scipy.signal
-import pyworld as pw
+# import pyworld as pw
 
 from TTS.tts.utils.data import StandardScaler
 
@@ -292,15 +292,16 @@ class AudioProcessor(object):
         return pad // 2, pad // 2 + pad % 2
 
     ### Compute F0 ###
-    def compute_f0(self, x):
-        f0, t = pw.dio(
-            x.astype(np.double),
-            fs=self.sample_rate,
-            f0_ceil=self.mel_fmax,
-            frame_period=1000 * self.hop_length / self.sample_rate,
-        )
-        f0 = pw.stonemask(x.astype(np.double), f0, t, self.sample_rate)
-        return f0
+    # TODO: pw causes some dep issues 
+    # def compute_f0(self, x):
+    #     f0, t = pw.dio(
+    #         x.astype(np.double),
+    #         fs=self.sample_rate,
+    #         f0_ceil=self.mel_fmax,
+    #         frame_period=1000 * self.hop_length / self.sample_rate,
+    #     )
+    #     f0 = pw.stonemask(x.astype(np.double), f0, t, self.sample_rate)
+    #     return f0
 
     ### Audio Processing ###
     def find_endpoint(self, wav, threshold_db=-40, min_silence_sec=0.8):
diff --git a/requirements.txt b/requirements.txt
index b1baadd7..1e92f17e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -21,5 +21,5 @@ cardboardlint==1.3.0
 pylint==2.5.3
 gdown
 umap-learn
-cython==0.29.20 # > 0.29.20 breaks pyworld installation with the min numpy req of Tensorflow 2.4.1
+cython
 pyyaml
\ No newline at end of file