diff --git a/requirements-dev.txt b/requirements-dev.txt
index 1510fd8..7d4fc6c 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,5 +1,5 @@
 atomicwrites==1.3.0
-attrs==19.1.0
+attrs==19.3.0
 certifi==2019.9.11
 chardet==3.0.4
 coverage==4.5.4
@@ -12,14 +12,14 @@ importlib-metadata==0.23
 mccabe==0.6.1
 more-itertools==7.2.0
 packaging==19.2
-pathlib2==2.3.4
+pathlib2==2.3.5
 pluggy==0.13.0
 py==1.8.0
 pycodestyle==2.5.0
 pyflakes==2.1.1
 pyparsing==2.4.2
-pytest==5.1.3
-pytest-cov==2.7.1
+pytest==5.2.1
+pytest-cov==2.8.1
 pytest-flakes==4.0.0
 PyYAML==5.1.2
 requests==2.22.0