diff --git a/cmake/toolchain/heptools-105c_LHCB_8.cmake b/cmake/toolchain/heptools-105c_LHCB_8.cmake
index 59f0ad3886fb636f56aa1b780253a1f9fa8d1e11..9e1a0dac0d4933177d92e57974898f447365ed17 100644
--- a/cmake/toolchain/heptools-105c_LHCB_8.cmake
+++ b/cmake/toolchain/heptools-105c_LHCB_8.cmake
@@ -7,7 +7,7 @@ SET(LHCB_JSON_FILE https://gitlab.cern.ch/lhcb-core/rpm-recipes/-/raw/master/LHC
 include(heptools-lhcbsetup)
 
 # generator versions from LHCB_7
-LCG_external_package(lhapdf            6.2.3                ${MCGENPATH}/lhapdf author=6.2.3 usecxxstd=1 )
+LCG_external_package(lhapdf            6.2.3p1              ${MCGENPATH}/lhapdf author=6.2.3 usecxxstd=1 )
 LCG_external_package(photos++          3.56.lhcb1           ${MCGENPATH}/photos++ author=3.56 hepmc=2 )
 LCG_external_package(pythia6           427.2.lhcb           ${MCGENPATH}/pythia6 author=6.4.27 hepevt=200000 )
 LCG_external_package(tauola++          1.1.6b.lhcb          ${MCGENPATH}/tauola++ author=1.1.6b hepmc=2)