diff --git a/requirements.txt b/requirements.txt
index 5f6ae20..5f605d3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -102,7 +102,7 @@ python-engineio==2.2.0
 python-socketio==2.0.0
 PyTweening==1.0.3
 pytz==2018.3
-PyYAML==3.12
+PyYAML==5.4
 repoze.lru==0.7
 requests==2.19.1
 requests-oauthlib==1.0.0
diff --git a/textanalyser/requirements.txt b/textanalyser/requirements.txt
index 5d3c22d..c39ee1f 100644
--- a/textanalyser/requirements.txt
+++ b/textanalyser/requirements.txt
@@ -137,7 +137,7 @@ python-socketio==2.0.0
 PyTweening==1.0.3
 pytz==2018.3
 pyxdg==0.25
-PyYAML==3.12
+PyYAML==5.4
 reportlab==3.4.0
 repoze.lru==0.7
 requests==2.19.1