diff --git a/requirements.txt b/requirements.txt
index a80cf254..b9d40310 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,5 +4,4 @@ sphinxcontrib-blockdiag
 sphinxcontrib-nwdiag
 sphinxcontrib-seqdiag
 sphinxcontrib-actdiag
-sphinxcontrib-inheritance
 blockdiagcontrib-cisco
\ No newline at end of file