diff --git a/requirements.txt b/requirements.txt
index 0c57da9eac..33cd292bf6 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -68,4 +68,5 @@ Werkzeug==0.16.1
 Whoosh==2.7.4
 xlrd==1.2.0
 zxcvbn-python==4.4.24
-paytmchecksum==1.7.0
+pycryptodome==3.9.8
+paytmchecksum==1.7.0
\ No newline at end of file