diff --git a/requirements_dev.txt b/requirements_dev.txt
index 92032521..790f0f83 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,17 +1,17 @@
 -e .
 bump2version==0.5.10
-wheel==0.33.1
+wheel==0.33.4
 watchdog==0.9.0
 flake8==3.7.7
-tox==3.7.0
-coverage==4.5.2
-Sphinx==1.8.4
+tox==3.13.1
+coverage==4.5.3
+Sphinx==2.1.2
 # only used for setup script
 # cryptography==1.0.1
 py==1.8.0
-pytest==4.3.0
-PyYAML==3.13
-prospector[with_everything]==1.1.6.2
+pytest==5.0.0
+PyYAML==5.1.1
+prospector[with_everything]==1.1.6.4
 python-dateutil>=2.6.0
 requests>=2.18
 black>=18.9b0; python_version >= '3.6'