diff --git a/requirements.txt b/requirements.txt
index 2785aa1..8de54f7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -63,7 +63,6 @@ pixman=0.34.0=vc14_2
 plotly=3.3.0=py_0
 pycairo=1.16.3=py36_vc14_0
 pycparser=2.19=py_0
-pycrypto=2.6.1=py36hfa6e2cd_9
 pyinstaller=3.3.1=py36_vc14_0
 pylint=2.1.1=py36_1000
 pymzml=0.7.8=pypi_0