diff --git a/requirements.txt b/requirements.txt
index 8302ed5a89..0102e4f87f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -45,7 +45,7 @@ nbconvert==6.5.0
 nbformat==5.4.0
 nest-asyncio==1.5.5
 neutronics-material-maker==0.1.11
-nlopt==2.7.0
+nlopt==2.7.1
 notebook==6.4.12
 numba==0.55.2
 numba-scipy==0.3.0