diff --git a/CMakeLists.txt b/CMakeLists.txt
index 82a933bb..3581a2bd 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -31,7 +31,7 @@ endif()
 
 # Define project
 project(Monitoring
-  VERSION 3.17.6
+  VERSION 3.18.0
   DESCRIPTION "O2 Monitoring library"
   LANGUAGES CXX
 )
@@ -217,7 +217,7 @@ target_compile_definitions(Monitoring
   )
 
 # Use C++17
-target_compile_features(Monitoring PUBLIC cxx_std_17)
+target_compile_features(Monitoring PUBLIC cxx_std_20)
 
 
 ####################################
diff --git a/src/ProcessDetails.cxx b/src/ProcessDetails.cxx
index d676806e..bf58292b 100644
--- a/src/ProcessDetails.cxx
+++ b/src/ProcessDetails.cxx
@@ -59,7 +59,7 @@ inline void ProcessDetails::generateProcessName()
 #endif
 
   if (mProcessName.empty()) {
-    mProcessName = "!";
+    mProcessName = "<undefined>";
   } else {
     mProcessName = mProcessName.substr(mProcessName.find_last_of("/") + 1);
   }