diff --git a/dev_requirements.txt b/dev_requirements.txt
index 09b99b33..0460c9da 100644
--- a/dev_requirements.txt
+++ b/dev_requirements.txt
@@ -1,4 +1,5 @@
 configobj>=5.0
+cryptography
 CT3>=3.1
 ephem>=4.1
 mkdocs
@@ -6,6 +7,6 @@ mkdocs-material
 mkdocs-material-extensions
 Pillow>=5.2
 poetry
-PyMySQL[cryptography]
+PyMySQL
 pyserial>=3.4
 pyusb>=1.0.2