diff --git a/recipe/meta.yaml b/recipe/meta.yaml
index ef77cef..0e73fe3 100644
--- a/recipe/meta.yaml
+++ b/recipe/meta.yaml
@@ -37,6 +37,7 @@ outputs:
         - {{ cdt('libxxf86vm') }}               # [linux]
         - {{ cdt('mesa-libgl-devel') }}         # [linux]
         - {{ cdt('mesa-dri-drivers') }}         # [linux]
+        - libcxx <18  # [osx]
       host:
         - libboost-python-devel
         - libboost-devel
@@ -51,6 +52,7 @@ outputs:
         - setuptools
         - six
         - xorg-libxfixes  # [linux]
+        - libcxx <18  # [osx]
       run:
         - biopython
         - future