diff --git a/cmake/toolchain/heptools-dev-generators.cmake b/cmake/toolchain/heptools-dev-generators.cmake
index 81c82412cd28e4381f60052582a176d1ffb87a16..639a2482371f4f5f1f7a25448db7ab4747cf5d67 100644
--- a/cmake/toolchain/heptools-dev-generators.cmake
+++ b/cmake/toolchain/heptools-dev-generators.cmake
@@ -24,7 +24,7 @@ LCG_external_package(syscalc           1.1.7          ${MCGENPATH}/syscalc)
 LCG_external_package(madgraph5amc      3.2.0.atlas          ${MCGENPATH}/madgraph5amc author=3.2.0)
 #LCG_external_package(madgraph5amc      3.1.2.beta.atlas1   ${MCGENPATH}/madgraph5amc author=3.1.2.beta)
 
-LCG_external_package(lhapdf            6.3.0          ${MCGENPATH}/lhapdf       )
+LCG_external_package(lhapdf            6.4.0          ${MCGENPATH}/lhapdf       )
 
 if(NOT(${LCG_COMP} STREQUAL clang))
 LCG_external_package(powheg-box-v2     r3744.lhcb.rdynamic    ${MCGENPATH}/powheg-box-v2 )