diff --git a/ghost/sigtools/fourier.py b/ghost/sigtools/fourier.py
index cdcfd48..e5271e3 100644
--- a/ghost/sigtools/fourier.py
+++ b/ghost/sigtools/fourier.py
@@ -2,26 +2,13 @@
 
 import logging
 import numpy as np
-import scipy.fftpack._fftpack as sff
 from . import convolution
 
 __all__ = ['clean_scipy_cache', 'chirpz_dft']
 
 def clean_scipy_cache():
-    sff.destroy_zfft_cache()
-    sff.destroy_zfftnd_cache()
-    sff.destroy_drfft_cache()
-    sff.destroy_cfft_cache()
-    sff.destroy_cfftnd_cache()
-    sff.destroy_rfft_cache()
-    sff.destroy_ddct2_cache()
-    sff.destroy_ddct1_cache()
-    sff.destroy_dct2_cache()
-    sff.destroy_dct1_cache()
-    sff.destroy_ddst2_cache()
-    sff.destroy_ddst1_cache()
-    sff.destroy_dst2_cache()
-    sff.destroy_dst1_cache()
+    # Scipy no longer exposes the cache clearing functions
+    pass
 
 def chirpz_dft(x):
     """Computes the DFT of a signal using the Chirp Z-transform.