Index: lnt/lnttool/main.py
===================================================================
--- lnt/lnttool/main.py
+++ lnt/lnttool/main.py
@@ -370,7 +370,7 @@
 
 @action_profile.command("upgrade")
 @click.argument("input", type=click.Path(exists=True))
-@click.argument("output", type=click.Path(exists=True))
+@click.argument("output", type=click.Path())
 def command_update(input, output):
     """upgrade a profile to the latest version"""
     import lnt.testing.profile.profile as profile
Index: tests/lnttool/Profile.py
===================================================================
--- tests/lnttool/Profile.py
+++ tests/lnttool/Profile.py
@@ -9,3 +9,8 @@
 
 # RUN: lnt profile getCodeForFunction %S/Inputs/test.lntprof fn1 | FileCheck --check-prefix=CHECK-GETFN1 %s
 # CHECK-GETFN1: [{}, 1048576, "add r0, r0, r0"], [{"cycles": 100.0}, 1048580, "sub r1, r0, r0"]]
+
+# RUN: mkdir -p %t
+# RUN: rm -rf %t/non_existing_output.lnt
+# RUN: lnt profile upgrade %S/Inputs/test.lntprof %t/non_existing_output.lnt
+# RUN: cat %t/non_existing_output.lnt