diff --git a/sdk/python/packages/flet-cli/src/flet_cli/commands/run.py b/sdk/python/packages/flet-cli/src/flet_cli/commands/run.py
index f2da83ab5..ceec661bc 100644
--- a/sdk/python/packages/flet-cli/src/flet_cli/commands/run.py
+++ b/sdk/python/packages/flet-cli/src/flet_cli/commands/run.py
@@ -337,7 +337,7 @@ def on_any_event(self, event):
 
     def print_output(self, p):
         while True:
-            line = p.stdout.readline()
+            line = p.stdout.readline().decode("utf-8", errors="replace")
             if not line:
                 break
             line = line.rstrip("\r\n")