diff --git a/requirements_dev.txt b/requirements_dev.txt
index afc6d0a..02fa564 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,7 +1,7 @@
-pytest~=6.2.5
-pylint~=2.11.1
-invoke~=1.6.0
-coverage~=5.5
+pytest
+pylint
+invoke
+coverage
 coveralls~=3.3.1
 rope~=1.7.0
 Sphinx~=4.2.0