diff --git a/README.md b/README.md
index 19ea7f3..a13aa79 100644
--- a/README.md
+++ b/README.md
@@ -11,7 +11,13 @@ Add a paragraph about the application here...
 
 ## Getting Started
 
-### Installing the xApp
+## Using Docker image
+
+```shell
+docker container run -itd --name iqos-xapp -e NEAR_RIC_IP="<NEAR_RIC_IP>" muriloavlis/iqos-xapp:latest
+```
+
+### Building the xApp
 
 Clone the xApp repository with the following command.
 
diff --git a/src/kpmManager.cpp b/src/kpmManager.cpp
index 9c5f80f..d967777 100644
--- a/src/kpmManager.cpp
+++ b/src/kpmManager.cpp
@@ -320,8 +320,7 @@ namespace KpmManager
         kpm_ind_msg_format_3_t const* msg_frm_3{&ind->msg.frm_3}; // ind message
 
         static int counter = 1;
-        u_int64_t now{get_time_now_us()};
-        u_int64_t latency{now - hdr_frm_1->collectStartTime};
+        u_int64_t latency{get_time_now_us() - hdr_frm_1->collectStartTime};
 
         // create a new scope
         {