diff --git a/requirements_dev.txt b/requirements_dev.txt
index f09b0313..8c9df541 100755
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -11,4 +11,4 @@ snakeviz==1.0.0
 asv==0.3
 nbdime==1.0.2
 nbval==0.9.1
-pytest==3.8.1
\ No newline at end of file
+pytest==3.9.3
\ No newline at end of file