diff --git a/espresso-array-bounds.patch b/espresso-array-bounds.patch
new file mode 100644
index 0000000..7b29fce
--- /dev/null
+++ b/espresso-array-bounds.patch
@@ -0,0 +1,19 @@
+diff --git a/src/core/p3m/interpolation.hpp b/src/core/p3m/interpolation.hpp
+index a25b0d8f66..0573648938 100644
+--- a/src/core/p3m/interpolation.hpp
++++ b/src/core/p3m/interpolation.hpp
+@@ -109,10 +109,10 @@ class p3m_interpolation_cache {
+     InterpolationWeights<cao> ret;
+     ret.ind = ca_fmp[i];
+ 
+-    auto const offset = ca_frac.data() + 3 * i * m_cao;
+-    boost::copy(make_const_span(offset + 0 * m_cao, m_cao), ret.w_x.begin());
+-    boost::copy(make_const_span(offset + 1 * m_cao, m_cao), ret.w_y.begin());
+-    boost::copy(make_const_span(offset + 2 * m_cao, m_cao), ret.w_z.begin());
++    auto const offset = ca_frac.data() + 3 * i * cao;
++    boost::copy(make_const_span(offset + 0 * cao, cao), ret.w_x.begin());
++    boost::copy(make_const_span(offset + 1 * cao, cao), ret.w_y.begin());
++    boost::copy(make_const_span(offset + 2 * cao, cao), ret.w_z.begin());
+ 
+     return ret;
+   }
diff --git a/espresso-tracers.patch b/espresso-tracers.patch
new file mode 100644
index 0000000..11560ac
--- /dev/null
+++ b/espresso-tracers.patch
@@ -0,0 +1,13 @@
+diff --git a/src/core/virtual_sites/lb_inertialess_tracers.cpp b/src/core/virtual_sites/lb_inertialess_tracers.cpp
+index 5aae5af66c..b87b2d4232 100644
+--- a/src/core/virtual_sites/lb_inertialess_tracers.cpp
++++ b/src/core/virtual_sites/lb_inertialess_tracers.cpp
+@@ -92,7 +92,7 @@ void IBM_UpdateParticlePositions(ParticleRange const &particles,
+   // Euler integrator
+   for (auto &p : particles) {
+     if (p.is_virtual()) {
+-      for (int axis = 0; axis < 2; axis++) {
++      for (int axis = 0; axis < 3; axis++) {
+ #ifdef EXTERNAL_FORCES
+         if (not p.is_fixed_along(axis))
+ #endif
diff --git a/espresso.spec b/espresso.spec
index 71f66f1..844c40c 100644
--- a/espresso.spec
+++ b/espresso.spec
@@ -3,7 +3,7 @@
 
 Name:           espresso
 Version:        4.2.1
-Release:        1%{?dist}
+Release:        2%{?dist}
 Summary:        Extensible Simulation Package for Research on Soft matter
 # segfault on s390x: https://github.com/espressomd/espresso/issues/3753
 # segfault on armv7hl: https://src.fedoraproject.org/rpms/espresso/pull-request/4
@@ -15,6 +15,12 @@ Source0:        https://github.com/%{name}md/%{name}/releases/download/%{version
 # fix for API change in setuptools
 # https://github.com/espressomd/espresso/pull/4709
 Patch0:         %{name}-setuptools.patch
+# fix for LB inertialess tracers integration bug
+# https://github.com/espressomd/espresso/pull/4714
+Patch1:         %{name}-tracers.patch
+# fix for GCC compiler warning -Warray-bounds
+# https://github.com/espressomd/espresso/pull/4715
+Patch2:         %{name}-array-bounds.patch
 
 BuildRequires:  gcc-c++
 BuildRequires:  cmake3 >= 3.16
@@ -106,6 +112,8 @@ This package contains %{name} compiled against MPICH2.
 %prep
 %setup -q -n %{name}
 %patch 0 -p1
+%patch 1 -p1
+%patch 2 -p1
 
 %build
 %global defopts \\\
@@ -163,6 +171,9 @@ done
 %{python3_sitearch}/mpich/%{name}md/
 
 %changelog
+* Wed Apr 26 2023 Jean-Noël Grad <jgrad@icp.uni-stuttgart.de> - 4.2.1-2
+- Fix LB inertialess tracers bug, fix compiler warnings
+
 * Tue Apr 18 2023 Jean-Noël Grad <jgrad@icp.uni-stuttgart.de> - 4.2.1-1
 - Version bump to v4.2.1