diff --git a/LICENSE b/LICENSE
index e7edd2a..a005a76 100644
--- a/LICENSE
+++ b/LICENSE
@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2019 Ondrej Čerman
+Copyright (c) 2018-2020 Ondrej Čerman
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
diff --git a/src/gui.c b/src/gui.c
index 115e31a..8378286 100644
--- a/src/gui.c
+++ b/src/gui.c
@@ -141,7 +141,7 @@ static void add_columns (GtkTreeView *treeview) {
 static void about_btn_clicked(GtkButton *button, gpointer user_data) {
     GtkWidget *dialog;
     const gchar *website = "https://github.com/ocerman/zenmonitor";
-    const gchar *msg = "<b>Zen Monitor</b> 1.2\n"
+    const gchar *msg = "<b>Zen Monitor</b> 1.3\n"
                        "Monitoring software for AMD Zen-based CPUs\n"
                        "<a href=\"%s\">%s</a>\n\n"
                        "Created by: Ondrej Čerman";
diff --git a/src/include/zenmonitor.h b/src/include/zenmonitor.h
index 21cc9fc..ff8f1a7 100644
--- a/src/include/zenmonitor.h
+++ b/src/include/zenmonitor.h
@@ -25,3 +25,4 @@ void sensor_init_free(SensorInit *s);
 gboolean check_zen();
 gchar *cpu_model();
 guint get_core_count();
+gboolean display_coreid;
diff --git a/src/ss/msr.c b/src/ss/msr.c
index 17c9530..f64c534 100644
--- a/src/ss/msr.c
+++ b/src/ss/msr.c
@@ -166,7 +166,7 @@ GSList* msr_get_sensors() {
 
     for (i = 0; i < cores; i++) {
         data = sensor_init_new();
-        data->label = g_strdup_printf("Core %d Power", cpu_dev_ids[i].coreid);
+        data->label = g_strdup_printf("Core %d Power", display_coreid ? cpu_dev_ids[i].coreid: i);
         data->value = &(core_power[i]);
         data->min = &(core_power_min[i]);
         data->max = &(core_power_max[i]);
diff --git a/src/ss/os.c b/src/ss/os.c
index 637c4ec..a491c02 100644
--- a/src/ss/os.c
+++ b/src/ss/os.c
@@ -80,7 +80,7 @@ GSList* os_get_sensors(void) {
 
     for (i = 0; i < cores; i++) {
         data = sensor_init_new();
-        data->label = g_strdup_printf("Core %d Frequency", cpu_dev_ids[i].coreid);
+        data->label = g_strdup_printf("Core %d Frequency", display_coreid ? cpu_dev_ids[i].coreid: i);
         data->value = &(core_freq[i]);
         data->min = &(core_freq_min[i]);
         data->max = &(core_freq_max[i]);
diff --git a/src/zenmonitor.c b/src/zenmonitor.c
index dbc2eec..09495c0 100644
--- a/src/zenmonitor.c
+++ b/src/zenmonitor.c
@@ -114,8 +114,26 @@ void sensor_init_free(SensorInit *s) {
     }
 }
 
+gboolean display_coreid = 0;
+
+static GOptionEntry options[] =
+{
+    { "coreid", 'c', 0, G_OPTION_ARG_NONE, &display_coreid, "Display core_id instead of core index", NULL },
+    { NULL }
+};
+
 int main (int argc, char *argv[])
 {
-    gtk_init(&argc, &argv);
+    GError *error = NULL;
+    GOptionContext *context;
+
+    context = g_option_context_new ("- Zenmonitor display options");
+    g_option_context_add_main_entries(context, options, NULL);
+    g_option_context_add_group(context, gtk_get_option_group (TRUE));
+    if (!g_option_context_parse(context, &argc, &argv, &error)) {
+        g_print ("option parsing failed: %s\n", error->message);
+        exit (1);
+    }
+
     start_gui(sensor_sources);
 }