diff --git a/setup.py b/setup.py
index 0c13014df5f61ae34ae79679d1411cd832c7e6f2..e2a1ae90b75867829508b789fbe340e15b29c426 100644
--- a/setup.py
+++ b/setup.py
@@ -100,7 +100,7 @@ setup(name="pytential",
           "pytools>=2018.2",
           "modepy>=2013.3",
           "pyopencl>=2013.1",
-          "boxtree>=2018.1",
+          "boxtree>=2018.2",
           "pymbolic>=2013.2",
           "loo.py>=2017.2",
           "sumpy>=2013.1",