diff --git a/prometheus_pgbouncer_exporter/config.py b/prometheus_pgbouncer_exporter/config.py
index 00dd71f..89e6092 100644
--- a/prometheus_pgbouncer_exporter/config.py
+++ b/prometheus_pgbouncer_exporter/config.py
@@ -49,7 +49,7 @@ def env_var_multi_replacer(loader, node):
         # Read file
         try:
             stream = open(filepath, "r")
-            self.config = yaml.load(stream)
+            self.config = yaml.load(stream, Loader=yaml.FullLoader)
 
             # Handle an empty configuration file
             if not self.config:
diff --git a/requirements.txt b/requirements.txt
index fd84758..35b04af 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,4 +2,4 @@ psycopg2==2.7.3.2
 prometheus_client==0.0.21
 python-json-logger==0.1.5
 pycodestyle
-PyYAML==5.1
+PyYAML==5.3.1
diff --git a/setup.py b/setup.py
index cc11fd7..66a8b07 100644
--- a/setup.py
+++ b/setup.py
@@ -22,7 +22,7 @@
   keywords                      = ['prometheus', 'pgbouncer'],
   classifiers                   = [],
   python_requires               = ' >= 3',
-  install_requires              = ['psycopg2 == 2.7.3.2', 'prometheus_client==0.0.21', 'python-json-logger==0.1.5', 'PyYAML==5.1'],
+  install_requires              = ['psycopg2 == 2.7.3.2', 'prometheus_client==0.0.21', 'python-json-logger==0.1.5', 'PyYAML==5.3.1'],
   entry_points                  = {
     'console_scripts': [
         'pgbouncer-exporter=prometheus_pgbouncer_exporter.cli:main',