diff --git a/REQUIREMENTS b/REQUIREMENTS
index 16f5512..8340c82 100644
--- a/REQUIREMENTS
+++ b/REQUIREMENTS
@@ -17,3 +17,4 @@ git+https://github.com/CIRCL/PyMISP.git#egg=pymisp
 pillow
 pytesseract
 SPARQLWrapper
+domaintools_api