diff --git a/conda/environment.devenv.yml b/conda/environment.devenv.yml
index 1a74006ae1..5a0068a0dc 100644
--- a/conda/environment.devenv.yml
+++ b/conda/environment.devenv.yml
@@ -58,7 +58,7 @@ dependencies:
 - boost
 - boost-cpp
 - cmake
-- coin3d
+- coin3d==4.0.0
 - compilers
 - conda
 - conda-build