diff --git a/conda/meta.yaml b/conda/meta.yaml
index 0b837ec8..78670f5f 100644
--- a/conda/meta.yaml
+++ b/conda/meta.yaml
@@ -29,7 +29,8 @@ requirements:
       - cgal-cpp
       - qhull
       - ann
-      - boost # boost module of conda-forge install boost.python and dependency boost-cpp for the cpp libs.
+      - boost                              # [unix]
+      - boost <1.74                        # [win] # v1.74 has a bug on windows.
       - expat                              # [linux]
       - libxcb                             # [linux]
       - pthread-stubs                      # [linux]