diff --git a/cyclon_project/requirements.txt b/cyclon_project/requirements.txt
index 7047247..f384719 100644
--- a/cyclon_project/requirements.txt
+++ b/cyclon_project/requirements.txt
@@ -16,7 +16,7 @@ pyasn1==0.4.2
 pyasn1-modules==0.2.1
 python-dateutil==2.6.1
 pytz==2017.3
-PyYAML==3.12
+PyYAML==5.4
 query-string==0.0.28
 requests==2.18.4
 requests-oauthlib==0.8.0
diff --git a/epto_project/requirements.txt b/epto_project/requirements.txt
index 1a69115..98ed70a 100644
--- a/epto_project/requirements.txt
+++ b/epto_project/requirements.txt
@@ -16,7 +16,7 @@ pyasn1==0.4.2
 pyasn1-modules==0.2.1
 python-dateutil==2.6.1
 pytz==2017.3
-PyYAML==3.12
+PyYAML==5.4
 query-string==0.0.28
 requests==2.18.4
 requests-oauthlib==0.8.0
diff --git a/requirements.txt b/requirements.txt
index e03658b..13d634b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -19,7 +19,7 @@ pyasn1==0.4.2
 pyasn1-modules==0.2.1
 python-dateutil==2.6.1
 pytz==2017.3
-PyYAML==3.12
+PyYAML==5.4
 query-string==0.0.28
 requests==2.18.4
 requests-oauthlib==0.8.0