diff --git a/CMakeLists.txt b/CMakeLists.txt
index 53631c5c378d41d4cf94de4c2c2849c1b3cfe882..934cbbca68556d35785e35720a071135d48c437c 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,7 +5,7 @@ CMAKE_MINIMUM_REQUIRED(VERSION 2.8.5)
 set(GEANT4_SRCS_REPOSITORY https://gitlab.cern.ch/lhcb/Geant4-srcs.git CACHE STRING "Repository for Geant4 sources")
 
 find_package(GaudiProject)
-gaudi_project(Geant4 v104r1
+gaudi_project(Geant4 v104r1p1
               DATA Geant4Files VERSION v104r0)
 
 # FIXME: hack for compatibility with CMT build
diff --git a/ReleaseNotes/v104r1p1.md b/ReleaseNotes/v104r1p1.md
new file mode 100644
index 0000000000000000000000000000000000000000..ef194b73b1a981ba060bd22a4b454d30d1eb6d75
--- /dev/null
+++ b/ReleaseNotes/v104r1p1.md
@@ -0,0 +1,5 @@
+2018-05-18 Geant4 v104r1p1
+===
+This is a minor update to `v104r1` to switch to `LCG 93`.
+
+This version is released on `Sim10` branch.
diff --git a/toolchain.cmake b/toolchain.cmake
index cff5f5448713f49127e358e66c48a1d8446d1e1b..15b65ea9ad3b298199942516253bb59c38b6fa16 100644
--- a/toolchain.cmake
+++ b/toolchain.cmake
@@ -1,5 +1,5 @@
 # Set the version of HEPTools to use
-set(heptools_version 91)
+set(heptools_version 93)
 
 # this check is needed because the toolchain is called when checking the
 # compiler (without the proper cache)