diff --git a/opendm/remote.py b/opendm/remote.py
index 029d3493..d520f653 100644
--- a/opendm/remote.py
+++ b/opendm/remote.py
@@ -474,7 +474,7 @@ class ToolchainTask(Task):
             argv = get_submodel_argv(config.config(), submodels_path, submodel_name)
 
             # Re-run the ODM toolchain on the submodel
-            system.run(" ".join(map(quote, argv)), env_vars=os.environ.copy())
+            system.run(" ".join(map(quote, map(str, argv))), env_vars=os.environ.copy())
 
             # This will only get executed if the command above succeeds
             self.touch(completed_file)
diff --git a/stages/splitmerge.py b/stages/splitmerge.py
index d17d7e07..69e05dd6 100644
--- a/stages/splitmerge.py
+++ b/stages/splitmerge.py
@@ -216,7 +216,7 @@ class ODMSplitStage(types.ODM_Stage):
                         argv = get_submodel_argv(args, tree.submodels_path, sp_octx.name())
 
                         # Re-run the ODM toolchain on the submodel
-                        system.run(" ".join(map(quote, argv)), env_vars=os.environ.copy())
+                        system.run(" ".join(map(quote, map(str, argv))), env_vars=os.environ.copy())
                 else:
                     lre.set_projects([os.path.abspath(os.path.join(p, "..")) for p in submodel_paths])
                     lre.run_toolchain()