diff --git a/src/algokit/cli/project/deploy.py b/src/algokit/cli/project/deploy.py
index f07577667..40b8c25d4 100644
--- a/src/algokit/cli/project/deploy.py
+++ b/src/algokit/cli/project/deploy.py
@@ -129,6 +129,8 @@ def _execute_deploy_command(  # noqa: PLR0913
         ) from ex
     else:
         if result.exit_code != 0:
+            header = " deploy command output: ".center(80, "·")
+            logger.error(f"\n{header}\n{result.output}")
             raise click.ClickException(f"Deployment command exited with error code = {result.exit_code}")
 
 
diff --git a/src/algokit/core/proc.py b/src/algokit/core/proc.py
index d2b593d36..d2059b2da 100644
--- a/src/algokit/core/proc.py
+++ b/src/algokit/core/proc.py
@@ -49,6 +49,7 @@ def run(  # noqa: PLR0913
         env=env,
         bufsize=1,  # line buffering, works because text=True
         encoding="utf-8",
+        errors="backslashreplace",
     ) as proc:
         assert proc.stdout  # type narrowing
         while exit_code is None: