diff --git a/requirements.txt b/requirements.txt
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,12 +1,12 @@
 # Linters
-flake8>=3.7.9,<4.0
-autopep8>=1.4.4,<2.0
-pycodestyle>=2.5.0,<3.0
+flake8>=3.9.2,<4.0
+autopep8>=1.5.7,<2.0
+pycodestyle>=2.7.0,<3.0
 
 # Tests and utilities
-PyYAML>=4.2b1,<5.1
+PyYAML>=5.4.1,<6.0
 
 # Tests
-mock>=2.0.0,<3.0
-salt==2019.2.2
-jsondiff==1.2.0
+mock>=4.0.3,<5.0
+json==3003
+jsondiff==1.3.0