diff --git a/cmake/toolchain/heptools-dev3python312.cmake b/cmake/toolchain/heptools-dev3python312.cmake
index f6b5138fcb89ad082019121d50cc224d575bc983..538589e655909aa540ca1b58d60300e9be7dfa09 100644
--- a/cmake/toolchain/heptools-dev3python312.cmake
+++ b/cmake/toolchain/heptools-dev3python312.cmake
@@ -295,3 +295,4 @@ LCG_external_package(nest_asyncio		1.6.0 			)
 LCG_external_package(entrypoints		0.4 			)
 LCG_external_package(pyproj			3.7.1 			)
 LCG_external_package(torch			2.6.0 			)
+LCG_external_package(optree			0.14.1 			)