diff --git a/LICENSE.md b/LICENSE.md
index 4891943..e3a1bc6 100644
--- a/LICENSE.md
+++ b/LICENSE.md
@@ -54,3 +54,6 @@
 - [pywin32](https://pypi.org/project/pywin32/) - PSF
 - [wmi](https://pypi.org/project/WMI/) - MIT
 - [psutil](https://pypi.org/project/psutil/) - BSD
+- [click](https://pypi.org/project/click/) - BSD-3-Clause
+- [cryptography](https://pypi.org/project/cryptography/) - BSD, Apache-2.0
+- [jwcrypto](https://pypi.org/project/jwcrypto/) - LGPLv3+
diff --git a/requirements.txt b/requirements.txt
index 1873176..02433ec 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -26,7 +26,7 @@
 pywin32==224;platform_system=='Windows'
 wmi==1.4.9;platform_system=='Windows'
 psutil==5.6.2
-cryptography>=2.4.2
-Click>=7.0
-jwcrypto>=0.6.0
+cryptography>=2.4.x,<2.5
+Click>=7.0,<7.1
+jwcrypto>=0.6,<0.7
 pathlib>=1.0.1