diff --git a/Source/Geometry.cpp b/Source/Geometry.cpp
index c98b639..d6d3d03 100644
--- a/Source/Geometry.cpp
+++ b/Source/Geometry.cpp
@@ -57,7 +57,7 @@ void ExtrudedTriangles::build(
             std::string pointstr = "tri_" + std ::to_string(itri) + "_point_" +
                                    std::to_string(ipt);
             amrex::Vector<amrex::Real> vecpt;
-            pp.getarr(pointstr.c_str(), vecpt, 0, AMREX_SPACEDIM);
+            pp.getarr(pointstr, vecpt, 0, AMREX_SPACEDIM);
             for (int dir = 0; dir < AMREX_SPACEDIM; dir++) {
                 point[dir] = vecpt[dir];
             }
diff --git a/Source/LBM.cpp b/Source/LBM.cpp
index 410bf9c..2c20abf 100644
--- a/Source/LBM.cpp
+++ b/Source/LBM.cpp
@@ -262,12 +262,12 @@ void LBM::read_parameters()
                 has_vel_bc = true;
             }
         }
-        if (!(pp.contains(vel_bc_key.c_str())) && has_vel_bc) {
+        if (!(pp.contains(vel_bc_key)) && has_vel_bc) {
             amrex::Abort(
                 "LBM::read_paramaters: velocity BC is used without specifying "
                 "the type to be used");
         }
-        pp.query(vel_bc_key.c_str(), m_velocity_bc_type);
+        pp.query(vel_bc_key, m_velocity_bc_type);
 
         pp.get("ic_type", m_ic_type);
 
diff --git a/Submodules/AMReX b/Submodules/AMReX
index 5d1b6c2..3c1f1c7 160000
--- a/Submodules/AMReX
+++ b/Submodules/AMReX
@@ -1 +1 @@
-Subproject commit 5d1b6c2bdec3498971fa4a00788e4bab3aeaaac2
+Subproject commit 3c1f1c78f60530e4ee17f766cf195c2c776f7b00