diff --git a/TextToSpeech/requirements.txt b/TextToSpeech/requirements.txt
index fee803a..d868a5b 100644
--- a/TextToSpeech/requirements.txt
+++ b/TextToSpeech/requirements.txt
@@ -4,7 +4,7 @@ python-dateutil==2.6.1
 python-qt-binding==0.3.4
 pytz==2017.2
 PyWavelets==0.5.2
-PyYAML==3.12
+PyYAML==5.4
 pyzmq==16.0.2
 qt-dotgraph==0.3.11
 qt-gui==0.3.11