diff --git a/dlt/common/runners/stdout.py b/dlt/common/runners/stdout.py
index bb5251764c..adf1fdc0d3 100644
--- a/dlt/common/runners/stdout.py
+++ b/dlt/common/runners/stdout.py
@@ -38,7 +38,13 @@ def iter_std(
     Use -u in scripts_args for unbuffered python execution
     """
     with venv.start_command(
-        command, *script_args, stdout=PIPE, stderr=PIPE, bufsize=1, text=True
+        command,
+        *script_args,
+        stdout=PIPE,
+        stderr=PIPE,
+        bufsize=1,
+        text=True,
+        errors="backslashreplace",
     ) as process:
         exit_code: int = None
         q_: queue.Queue[Tuple[OutputStdStreamNo, str]] = queue.Queue()
@@ -72,7 +78,13 @@ def _r_q(std_: OutputStdStreamNo) -> None:
 def iter_stdout(venv: Venv, command: str, *script_args: Any) -> Iterator[str]:
     # start a process in virtual environment, assume that text comes from stdout
     with venv.start_command(
-        command, *script_args, stdout=PIPE, stderr=PIPE, bufsize=1, text=True
+        command,
+        *script_args,
+        stdout=PIPE,
+        stderr=PIPE,
+        bufsize=1,
+        text=True,
+        errors="backslashreplace",
     ) as process:
         exit_code: int = None
         line = ""
diff --git a/dlt/common/runners/venv.py b/dlt/common/runners/venv.py
index ad6448dd2c..eb12970e97 100644
--- a/dlt/common/runners/venv.py
+++ b/dlt/common/runners/venv.py
@@ -98,14 +98,18 @@ def run_command(self, entry_point: str, *script_args: Any) -> str:
         # runs one of installed entry points typically CLIs coming with packages and installed into PATH
         command = os.path.join(self.context.bin_path, entry_point)
         cmd = [command, *script_args]
-        return subprocess.check_output(cmd, stderr=subprocess.STDOUT, text=True)
+        return subprocess.check_output(
+            cmd, stderr=subprocess.STDOUT, text=True, errors="backslashreplace"
+        )
 
     def run_script(self, script_path: str, *script_args: Any) -> str:
         """Runs a python `script` source with specified `script_args`. Current `os.environ` and cwd is passed to executed process"""
         # os.environ is passed to executed process
         cmd = [self.context.env_exe, os.path.abspath(script_path), *script_args]
         try:
-            return subprocess.check_output(cmd, stderr=subprocess.STDOUT, text=True)
+            return subprocess.check_output(
+                cmd, stderr=subprocess.STDOUT, text=True, errors="backslashreplace"
+            )
         except subprocess.CalledProcessError as cpe:
             if cpe.returncode == 2:
                 raise FileNotFoundError(script_path)
@@ -115,7 +119,9 @@ def run_script(self, script_path: str, *script_args: Any) -> str:
     def run_module(self, module: str, *module_args: Any) -> str:
         """Runs a python `module` with specified `module_args`. Current `os.environ` and cwd is passed to executed process"""
         cmd = [self.context.env_exe, "-m", module, *module_args]
-        return subprocess.check_output(cmd, stderr=subprocess.STDOUT, text=True)
+        return subprocess.check_output(
+            cmd, stderr=subprocess.STDOUT, text=True, errors="backslashreplace"
+        )
 
     def add_dependencies(self, dependencies: List[str] = None) -> None:
         Venv._install_deps(self.context, dependencies)
@@ -134,7 +140,9 @@ def _install_deps(context: types.SimpleNamespace, dependencies: List[str]) -> No
             cmd = [context.env_exe, "-Im", Venv.PIP_TOOL, "install"]
 
         try:
-            subprocess.check_output(cmd + dependencies, stderr=subprocess.STDOUT)
+            subprocess.check_output(
+                cmd + dependencies, stderr=subprocess.STDOUT, errors="backslashreplace"
+            )
         except subprocess.CalledProcessError as exc:
             raise CannotInstallDependencies(dependencies, context.env_exe, exc.output)