diff --git a/setup.py b/setup.py
index c16473f8f..69821ce80 100644
--- a/setup.py
+++ b/setup.py
@@ -57,7 +57,7 @@ def run_tests(self):
                         'six==1.12.0'],
       tests_require=['pytest==4.6.5',
                      'mock==3.0.5',
-                     'psutil==5.6.3',
+                     'psutil==5.6.6',
                      'memory_profiler==0.55',
                      'statistics==1.0.3.5',
                      'requests-testadapter==0.3.0'],