diff --git a/conda/meta.yaml b/conda/meta.yaml
index a917bad..2dcd568 100644
--- a/conda/meta.yaml
+++ b/conda/meta.yaml
@@ -42,7 +42,7 @@ requirements:
   run:
     - python
     - setuptools
-    - openalea.plantgl
+    - {{ pin_compatible('openalea.plantgl', max_pin='x.x') }}
     - boost
     - ipython
     - qtconsole