diff --git a/MC/config/PWGLF/pythia8/generator/hypernuclei.gun b/MC/config/PWGLF/pythia8/generator/hypernuclei.gun
index 55af09ba2..af21f0faf 100644
--- a/MC/config/PWGLF/pythia8/generator/hypernuclei.gun
+++ b/MC/config/PWGLF/pythia8/generator/hypernuclei.gun
@@ -1,8 +1,8 @@
 # PDG           N      ptMin   ptMax   yMin   yMax
-1000010020      1      0.2     6       -1     1
-1000010030      1      0.2     6       -1     1
-1000020030      1      0.2     6       -1     1
-1000020040      1      0.2     6       -1     1
-1010010030      1      0.2     6       -1     1
-1010010040      1      0.2     6       -1     1
-1010020040      1      0.2     6       -1     1
+1000010020      1      0.2     10      -1     1
+1000010030      1      0.2     10      -1     1
+1000020030      1      0.2     10      -1     1
+1000020040      1      0.2     10      -1     1
+1010010030      1      0.2     10      -1     1
+1010010040      1      0.2     10      -1     1
+1010020040      1      0.2     10      -1     1
diff --git a/MC/run/PWGLF/run_HyperNucleiInjectedGap.sh b/MC/run/PWGLF/run_HyperNucleiInjectedGap.sh
index 027f6d0a0..cbf094547 100644
--- a/MC/run/PWGLF/run_HyperNucleiInjectedGap.sh
+++ b/MC/run/PWGLF/run_HyperNucleiInjectedGap.sh
@@ -15,7 +15,7 @@
 
 NWORKERS=${NWORKERS:-8}
 MODULES="--skipModules ZDC"
-SIMENGINE=${SIMENGINE:-TGeant3}
+SIMENGINE=${SIMENGINE:-TGeant4}
 NSIGEVENTS=${NSIGEVENTS:-1}
 NBKGEVENTS=${NBKGEVENTS:-1}
 NTIMEFRAMES=${NTIMEFRAMES:-1}