diff --git a/cmake/toolchain/heptools-dev4.cmake b/cmake/toolchain/heptools-dev4.cmake
index 7deebb62da1f35415b0e5bae8d262af594e3f896..40bbd7dbefada2f999d07e78a7e73ef008bb75d9 100644
--- a/cmake/toolchain/heptools-dev4.cmake
+++ b/cmake/toolchain/heptools-dev4.cmake
@@ -8,12 +8,7 @@ include(heptools-dev-generators)
 #LCG_external_package(ROOT v6-32-00-patches GIT=http://root.cern.ch/git/root.git)
 LCG_AA_project(ROOT  6.32.04)
 
-#  Add Boost 1.84.0 for testing on dev4
-#if((${LCG_COMP} MATCHES gcc AND ${LCG_COMPVERS} GREATER 8) OR (${LCG_COMP} MATCHES clang AND ${LCG_COMPVERS} GREATER 12))
-#  LCG_external_package(Boost             1.84.0                                   )
-#else()
-#  LCG_external_package(Boost             1.78.0                                   )
-#endif()
+LCG_external_package(Boost             1.86.0                                   )
 
 #if(${LCG_OS}${LCG_OSVERS} MATCHES centos|ubuntu|el)
 #  if(((${LCG_COMP} MATCHES gcc) AND (${LCG_COMPVERS} GREATER 7)) OR (${LCG_COMP} MATCHES clang))