diff --git a/recipe/gh4537.patch b/recipe/gh4537.patch
index 19ec14f..3a0c6cd 100644
--- a/recipe/gh4537.patch
+++ b/recipe/gh4537.patch
@@ -6,7 +6,7 @@ index f5de33531..da3ffd36a 100644
      (especially on recent GPUs) that make it truly unique among simulation codes.
      """
      setupKeywords["extras_require"]         = {"cuda12": f"openmm-cuda=={setupKeywords['version']}.12", "cuda11.2": f"openmm-cuda=={setupKeywords['version']}.11.2", "cuda11.8": f"openmm-cuda=={setupKeywords['version']}.11.8"}
-+    setupKeywords["install_requires"]  = ["numpy"]
++    setupKeywords["install_requires"]  = ["numpy<2"]
  
      define_macros = [('MAJOR_VERSION', major_version_num),
                       ('MINOR_VERSION', minor_version_num)]