diff --git a/setup.py b/setup.py
index acdbc43..ce3871f 100755
--- a/setup.py
+++ b/setup.py
@@ -18,7 +18,7 @@
     install_requires=[
         "numpy<1.21",
         "numba",
-        "suitesparse-graphblas",
+        "suitesparse-graphblas<6.1.4",
         "scipy",
         "contextvars",
         "mmparse",