diff --git a/dev-requirements.txt b/dev-requirements.txt
index e7e1fc0..0c42c9f 100644
--- a/dev-requirements.txt
+++ b/dev-requirements.txt
@@ -13,19 +13,19 @@ idna~=2.8
 more-itertools~=7.0.0
 pathlib~=1.0.1
 pathtools~=0.1.2
-pip~=19.0.3
+pip==19.1.1
 pluggy>=0.9.0
 py~=1.8.0
 pycodestyle~=2.5.0
-pytest~=4.4.0
-pytest-cov~=2.6.1
+pytest==4.5.0
+pytest-cov==2.7.1
 pytest-watch~=4.2.0
 pyyaml>=4.2b1
-requests~=2.21.0
-setuptools~=40.8.0
+requests==2.22.0
+setuptools==41.0.1
 six~=1.12.0
-urllib3~=1.24.1
+urllib3==1.25.3
 watchdog~=0.9.0
-wheel~=0.33.1
+wheel==0.33.4
 
 twine~=1.13.0