diff --git a/contrib/ecalproto/include/ecal/protobuf/ecal_proto_hlp.h b/contrib/ecalproto/include/ecal/protobuf/ecal_proto_hlp.h
index f36195022..3c3772dc4 100644
--- a/contrib/ecalproto/include/ecal/protobuf/ecal_proto_hlp.h
+++ b/contrib/ecalproto/include/ecal/protobuf/ecal_proto_hlp.h
@@ -41,7 +41,7 @@ namespace eCAL
 {
 namespace protobuf
 {
-  inline std::string CreateCompleteMessageName(const std::string& name_, const std::string& prefix_)
+  inline std::string CreateCompleteMessageName(absl::string_view name_, const std::string& prefix_)
   {
     std::string message_name;
     if (!prefix_.empty())
@@ -58,7 +58,7 @@ namespace protobuf
     return element_.substr(0, element_.find('.'));
   }
 
-  inline bool HasFile(const google::protobuf::FileDescriptorSet& fset_, const std::string& fname_)
+  inline bool HasFile(const google::protobuf::FileDescriptorSet& fset_, absl::string_view fname_)
   {
     for (auto findex = 0; findex < fset_.file_size(); ++findex)
     {
@@ -140,18 +140,16 @@ namespace protobuf
 
   inline std::string GetProtoMessageTypeName(const google::protobuf::Message& msg_)
   {
-    return(std::string("proto:") + msg_.GetTypeName());
+    return(std::string("proto:") + std::string(msg_.GetTypeName()));
   }
 
   inline std::vector<std::string> GetProtoMessageFieldNames(const std::vector<const google::protobuf::FieldDescriptor*>& fields_)
   {
     std::vector<std::string> names_vec;
-    std::transform(fields_.begin(), fields_.end(), std::back_inserter(names_vec), 
-      [](const google::protobuf::FieldDescriptor* field) 
+    for (const google::protobuf::FieldDescriptor* field : fields_)
     {
-      return field->name();
+      names_vec.emplace_back(field->name());
     }
-    );
     return names_vec;
   }
 
@@ -162,7 +160,7 @@ namespace protobuf
     for (int i = 0; i < count; ++i)
     {
       auto field = descriptor->field(i);
-      names_vec.push_back(field->name());
+      names_vec.emplace_back(field->name());
     }
     return names_vec;
   }
diff --git a/contrib/ecalproto/src/ecal_proto_decoder.cpp b/contrib/ecalproto/src/ecal_proto_decoder.cpp
index 786ec7885..1e5ad490a 100644
--- a/contrib/ecalproto/src/ecal_proto_decoder.cpp
+++ b/contrib/ecalproto/src/ecal_proto_decoder.cpp
@@ -48,11 +48,11 @@ namespace protobuf
 
     if (!is_Array_)
     {
-      visitor->ScalarMessageStart({ name_, prefix_, (int)index_, msg_.GetTypeName()}, GetProtoMessageFieldNames(descriptor));
+      visitor->ScalarMessageStart({ name_, prefix_, (int)index_, std::string(msg_.GetTypeName())}, GetProtoMessageFieldNames(descriptor));
     }
     else
     {
-      visitor->ArrayMessageStart({ name_, prefix_, (int)index_, msg_.GetTypeName()}, GetProtoMessageFieldNames(descriptor));
+      visitor->ArrayMessageStart({ name_, prefix_, (int)index_, std::string(msg_.GetTypeName())}, GetProtoMessageFieldNames(descriptor));
     }
 
     std::string complete_message_name = CreateCompleteMessageName(name_, prefix_);
@@ -73,7 +73,7 @@ namespace protobuf
         {
           accept_complete_array = visitor->AcceptMessage(child_message_name + "[*]");
           fsize = ref_ptr->FieldSize(msg_, field);
-          visitor->ArrayStart({ field->name(), complete_message_name, field->number(), field->type_name() }, field->type(), fsize);
+          visitor->ArrayStart({ std::string(field->name()), complete_message_name, field->number(), std::string(field->type_name()) }, field->type(), fsize);
         }
 
         const google::protobuf::FieldDescriptor::CppType fdt = field->cpp_type();
@@ -82,7 +82,7 @@ namespace protobuf
         case google::protobuf::FieldDescriptor::CPPTYPE_INT32:      // TYPE_INT32, TYPE_SINT32, TYPE_SFIXED32
           if (field->is_repeated())
           {
-            MessageInfo info{field->name(), complete_message_name, 0, field->type_name()};
+            MessageInfo info{std::string(field->name()), complete_message_name, 0, std::string(field->type_name())};
             for (int fnum = 0; fnum < fsize; ++fnum)
             {
               if (accept_complete_array || visitor->AcceptMessage(child_message_name + "[" + std::to_string(fnum) +"]"))
@@ -94,13 +94,13 @@ namespace protobuf
           }
           else
           {
-            visitor->ScalarValueIntegral({ field->name(), complete_message_name, field->number(), field->type_name() }, ref_ptr->GetInt32(msg_, field));
+            visitor->ScalarValueIntegral({ std::string(field->name()), complete_message_name, field->number(), std::string(field->type_name()) }, ref_ptr->GetInt32(msg_, field));
           }
           break;
         case google::protobuf::FieldDescriptor::CPPTYPE_UINT32:     // TYPE_UINT32, TYPE_FIXED32
           if (field->is_repeated())
           {
-            MessageInfo info{field->name(), complete_message_name, 0, field->type_name()};
+            MessageInfo info{std::string(field->name()), complete_message_name, 0, std::string(field->type_name())};
             for (int fnum = 0; fnum < fsize; ++fnum)
             {
               if (accept_complete_array || visitor->AcceptMessage(child_message_name + "[" + std::to_string(fnum) + "]"))
@@ -112,13 +112,13 @@ namespace protobuf
           }
           else
           {
-            visitor->ScalarValueIntegral({field->name(), complete_message_name, field->number(), field->type_name()}, ref_ptr->GetUInt32(msg_, field));
+            visitor->ScalarValueIntegral({std::string(field->name()), complete_message_name, field->number(), std::string(field->type_name())}, ref_ptr->GetUInt32(msg_, field));
           }
           break;
         case google::protobuf::FieldDescriptor::CPPTYPE_INT64:      // TYPE_INT64, TYPE_SINT64, TYPE_SFIXED64
           if (field->is_repeated())
           {
-            MessageInfo info{field->name(), complete_message_name, 0, field->type_name()};
+            MessageInfo info{std::string(field->name()), complete_message_name, 0, std::string(field->type_name())};
             for (int fnum = 0; fnum < fsize; ++fnum)
             {
               if (accept_complete_array || visitor->AcceptMessage(child_message_name + "[" + std::to_string(fnum) + "]"))
@@ -130,13 +130,13 @@ namespace protobuf
           }
           else
           {
-            visitor->ScalarValueIntegral({field->name(), complete_message_name, field->number(), field->type_name() }, ref_ptr->GetInt64(msg_, field));
+            visitor->ScalarValueIntegral({std::string(field->name()), complete_message_name, field->number(), std::string(field->type_name()) }, ref_ptr->GetInt64(msg_, field));
           }
           break;
         case google::protobuf::FieldDescriptor::CPPTYPE_UINT64:     // TYPE_UINT64, TYPE_FIXED64
           if (field->is_repeated())
           {
-            MessageInfo info{field->name(), complete_message_name, 0, field->type_name()};
+            MessageInfo info{std::string(field->name()), complete_message_name, 0, std::string(field->type_name())};
             for (int fnum = 0; fnum < fsize; ++fnum)
             {
               if (accept_complete_array || visitor->AcceptMessage(child_message_name + "[" + std::to_string(fnum) + "]"))
@@ -148,13 +148,13 @@ namespace protobuf
           }
           else
           {
-            visitor->ScalarValueIntegral({field->name(), complete_message_name, field->number(), field->type_name() }, ref_ptr->GetUInt64(msg_, field));
+            visitor->ScalarValueIntegral({std::string(field->name()), complete_message_name, field->number(), std::string(field->type_name()) }, ref_ptr->GetUInt64(msg_, field));
           }
           break;
         case google::protobuf::FieldDescriptor::CPPTYPE_FLOAT:      // TYPE_FLOAT
           if (field->is_repeated())
           {
-            MessageInfo info{field->name(), complete_message_name, 0, field->type_name()};
+            MessageInfo info{std::string(field->name()), complete_message_name, 0, std::string(field->type_name())};
             for (int fnum = 0; fnum < fsize; ++fnum)
             {
               if (accept_complete_array || visitor->AcceptMessage(child_message_name + "[" + std::to_string(fnum) + "]"))
@@ -166,13 +166,13 @@ namespace protobuf
           }
           else
           {
-            visitor->ScalarValueIntegral({field->name(), complete_message_name, field->number(), field->type_name() }, ref_ptr->GetFloat(msg_, field));
+            visitor->ScalarValueIntegral({std::string(field->name()), complete_message_name, field->number(), std::string(field->type_name()) }, ref_ptr->GetFloat(msg_, field));
           }
           break;
         case google::protobuf::FieldDescriptor::CPPTYPE_DOUBLE:     // TYPE_DOUBLE
           if (field->is_repeated())
           {
-            MessageInfo info{field->name(), complete_message_name, 0, field->type_name()};
+            MessageInfo info{std::string(field->name()), complete_message_name, 0, std::string(field->type_name())};
             for (int fnum = 0; fnum < fsize; ++fnum)
             {
               if (accept_complete_array || visitor->AcceptMessage(child_message_name + "[" + std::to_string(fnum) + "]"))
@@ -184,13 +184,13 @@ namespace protobuf
           }
           else
           {
-            visitor->ScalarValueIntegral({field->name(), complete_message_name, field->number(), field->type_name() }, ref_ptr->GetDouble(msg_, field));
+            visitor->ScalarValueIntegral({std::string(field->name()), complete_message_name, field->number(), std::string(field->type_name()) }, ref_ptr->GetDouble(msg_, field));
           }
           break;
         case google::protobuf::FieldDescriptor::CPPTYPE_BOOL:       // TYPE_BOOL
           if (field->is_repeated())
           {
-            MessageInfo info{field->name(), complete_message_name, 0, field->type_name()};
+            MessageInfo info{std::string(field->name()), complete_message_name, 0, std::string(field->type_name())};
             for (int fnum = 0; fnum < fsize; ++fnum)
             {
               if (accept_complete_array || visitor->AcceptMessage(child_message_name + "[" + std::to_string(fnum) + "]"))
@@ -202,31 +202,31 @@ namespace protobuf
           }
           else
           {
-            visitor->ScalarValueIntegral({field->name(), complete_message_name, field->number() , field->type_name()}, ref_ptr->GetBool(msg_, field));
+            visitor->ScalarValueIntegral({std::string(field->name()), complete_message_name, field->number() , std::string(field->type_name())}, ref_ptr->GetBool(msg_, field));
           }
           break;
         case google::protobuf::FieldDescriptor::CPPTYPE_ENUM:       // TYPE_ENUM
           if (field->is_repeated())
           {
-            MessageInfo info{field->name(), complete_message_name, 0, field->type_name()};
+            MessageInfo info{std::string(field->name()), complete_message_name, 0, std::string(field->type_name())};
             for (int fnum = 0; fnum < fsize; ++fnum)
             {
               if (accept_complete_array || visitor->AcceptMessage(child_message_name + "[" + std::to_string(fnum) + "]"))
               {
                 info.id = fnum;
-                visitor->ArrayValueEnum(info, ref_ptr->GetRepeatedEnum(msg_, field, fnum)->number(), ref_ptr->GetRepeatedEnum(msg_, field, fnum)->name());
+                visitor->ArrayValueEnum(info, ref_ptr->GetRepeatedEnum(msg_, field, fnum)->number(), std::string(ref_ptr->GetRepeatedEnum(msg_, field, fnum)->name()));
               }
             }
           }
           else
           {
-            visitor->ScalarValueEnum({field->name(), complete_message_name, field->number(), field->type_name() }, ref_ptr->GetEnum(msg_, field)->number(), ref_ptr->GetEnum(msg_, field)->name());
+            visitor->ScalarValueEnum({std::string(field->name()), complete_message_name, field->number(), std::string(field->type_name()) }, ref_ptr->GetEnum(msg_, field)->number(), std::string(ref_ptr->GetEnum(msg_, field)->name()));
           }
           break;
         case google::protobuf::FieldDescriptor::CPPTYPE_STRING:     // TYPE_STRING, TYPE_BYTES
           if (field->is_repeated())
           {
-            MessageInfo info{field->name(), complete_message_name, 0, field->type_name()};
+            MessageInfo info{std::string(field->name()), complete_message_name, 0, std::string(field->type_name())};
             for (int fnum = 0; fnum < fsize; ++fnum)
             {
               if (accept_complete_array || visitor->AcceptMessage(child_message_name + "[" + std::to_string(fnum) + "]"))
@@ -247,11 +247,11 @@ namespace protobuf
           {
             if (field->type() == google::protobuf::FieldDescriptor::TYPE_STRING)
             {
-              visitor->ScalarValueString({field->name(), complete_message_name, field->number(), field->type_name()}, ref_ptr->GetString(msg_, field));
+              visitor->ScalarValueString({std::string(field->name()), complete_message_name, field->number(), std::string(field->type_name())}, ref_ptr->GetString(msg_, field));
             }
             else // TYPE_BYTES
             {
-              visitor->ScalarValueBytes({field->name(), complete_message_name, field->number(), field->type_name() }, ref_ptr->GetString(msg_, field));
+              visitor->ScalarValueBytes({std::string(field->name()), complete_message_name, field->number(), std::string(field->type_name()) }, ref_ptr->GetString(msg_, field));
             }
           }
           break;
@@ -285,7 +285,7 @@ namespace protobuf
             msg.GetReflection()->ListFields(msg, &msg_fields);
 
             if (prefix_.find(field->name()) == std::string::npos || !msg_fields.empty())
-              ProcProtoMsg(msg, field->name(), complete_message_name, false, field->number());
+              ProcProtoMsg(msg, std::string(field->name()), complete_message_name, false, field->number());
           }
         }
         break;
diff --git a/ecal/core/src/pubsub/ecal_proto_dyn_json_sub.cpp b/ecal/core/src/pubsub/ecal_proto_dyn_json_sub.cpp
index 0797a0b98..071414fa4 100644
--- a/ecal/core/src/pubsub/ecal_proto_dyn_json_sub.cpp
+++ b/ecal/core/src/pubsub/ecal_proto_dyn_json_sub.cpp
@@ -158,7 +158,7 @@ namespace eCAL
         if (msg_callback)
         {
 
-          google::protobuf::util::JsonOptions options;
+          google::protobuf::util::JsonPrintOptions options;
 #if GOOGLE_PROTOBUF_VERSION >= 5026000
         options.always_print_fields_with_no_presence = true;
 #else