diff --git a/pipreqs/mapping b/pipreqs/mapping
index c1729eb..6cf02eb 100644
--- a/pipreqs/mapping
+++ b/pipreqs/mapping
@@ -10,6 +10,7 @@ BeautifulSoupTests:BeautifulSoup
 BioSQL:biopython
 BuildbotStatusShields:BuildbotEightStatusShields
 ComputedAttribute:ExtensionClass
+constraint:python-constraint
 Crypto:pycryptodome
 Cryptodome:pycryptodomex
 FSM:pexpect