diff --git a/src/H5Format.cpp b/src/H5Format.cpp
index 54d1b02..599ee49 100644
--- a/src/H5Format.cpp
+++ b/src/H5Format.cpp
@@ -93,8 +93,11 @@ const H5::PredType& H5FormatUtils::get_dataset_data_type(const string& type)
 
     } else if (type == "uint32") {
         return H5::PredType::NATIVE_UINT32;
+    
+    } else if (type == "uint64") {
+        return H5::PredType::NATIVE_UINT64;
 
-    }if (type == "int8") {
+    } else if (type == "int8") {
         return H5::PredType::NATIVE_INT8;
         
     } else if (type == "int16") {
@@ -103,10 +106,13 @@ const H5::PredType& H5FormatUtils::get_dataset_data_type(const string& type)
     } else if (type == "int32") {
         return H5::PredType::NATIVE_INT32;
 
+    } else if (type == "int64") {
+        return H5::PredType::NATIVE_INT64;
+
     } else {
         // We cannot really convert this attribute.
         stringstream error_message;
-        error_message << "[H5FormatUtils::get_dataset_data_type] Unsupported array data_type " << type << endl;
+        error_message << "[H5FormatUtils::get_dataset_data_type] Unsupported dataset data_type " << type << endl;
 
         throw runtime_error(error_message.str());
     }
diff --git a/src/ZmqReceiver.cpp b/src/ZmqReceiver.cpp
index f265150..4c902a0 100644
--- a/src/ZmqReceiver.cpp
+++ b/src/ZmqReceiver.cpp
@@ -84,7 +84,10 @@ shared_ptr<char> ZmqReceiver::get_value_from_json(const pt::ptree& json_header,
     } else if (type == "uint32") {
         return shared_ptr<char>(reinterpret_cast<char*>(new uint32_t(json_header.get<uint32_t>(name))));
 
-    }if (type == "int8") {
+    } else if (type == "uint64") {
+        return shared_ptr<char>(reinterpret_cast<char*>(new uint64_t(json_header.get<uint64_t>(name))));
+
+    } else if (type == "int8") {
         return shared_ptr<char>(reinterpret_cast<char*>(new int8_t(json_header.get<int8_t>(name))));
         
     } else if (type == "int16") {
@@ -92,7 +95,10 @@ shared_ptr<char> ZmqReceiver::get_value_from_json(const pt::ptree& json_header,
 
     } else if (type == "int32") {
         return shared_ptr<char>(reinterpret_cast<char*>(new int32_t(json_header.get<int32_t>(name))));
-
+    
+    } else if (type == "int64") {
+        return shared_ptr<char>(reinterpret_cast<char*>(new int64_t(json_header.get<uint32_t>(name))));
+    
     } else if (type == "float32") {
         return shared_ptr<char>(reinterpret_cast<char*>(new float(json_header.get<float>(name))));