diff --git a/requirements.txt b/requirements.txt
index e0a68974..b8a197cd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,5 +1,4 @@
 cryptography
-dataclasses==0.8;python_version~="3.6.0"
-PyYaml>=5.1
-jinja2
-
+dataclasses~=0.8;python_version~="3.6.0"
+PyYaml >= 6.0.1, < 7.0.0
+jinja2 >= 3.0.0, < 4.0.0