diff --git a/requirements.txt b/requirements.txt
index e9d96d74..47fa1ec0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,14 +1,14 @@
-numpy==1.14.3
+numpy>=1.14.3
 torch>=0.4.1
-librosa==0.5.1
-Unidecode==0.4.20
+librosa>=0.5.1
+Unidecode>=0.4.20
 tensorboard
 tensorboardX
 matplotlib
 Pillow
 flask
-scipy==0.19.0
+scipy
 tqdm
-git+git://github.com/bootphon/phonemizer@master
 soundfile
+phonemizer
 bokeh==1.4.0