diff --git a/openfoam/run/__main__.py b/openfoam/run/__main__.py
index 900b9e6..4bf9cca 100644
--- a/openfoam/run/__main__.py
+++ b/openfoam/run/__main__.py
@@ -32,8 +32,9 @@ log = logging.getLogger('openfoam')
 
 log.info('Starting program')
 
-input_dir = Path(config.get('main', 'input_dir'), config.get('main', 'case'))
-work_dir = Path(config.get('main', 'work_dir'))
+input_dir = Path(config.get('main', 'input_dir'), config.get('main', 'case'))\
+    .expanduser()
+work_dir = Path(config.get('main', 'work_dir')).expanduser()
 
 if not work_dir.exists():
     log.error(f'Work directory ({work_dir}) not found')
@@ -59,7 +60,7 @@ if config.getboolean('stl', 'copy', fallback=False):
             ('rm', '-r', stl_dir)
         )
 
-    stl_in = Path(config.get('stl', 'from'))
+    stl_in = Path(config.get('stl', 'from')).expanduser()
     log.info(f'Copying stl directory ({stl_in} -> {stl_dir})')
     sp.run(
         ('cp', '-r', stl_in, stl_dir)