diff --git a/.development/pyboard_util.py b/.development/pyboard_util.py
index e4f8be3..009ff3b 100644
--- a/.development/pyboard_util.py
+++ b/.development/pyboard_util.py
@@ -81,7 +81,7 @@ def find_tty():
 
 def check_run(paths):
     for filename in paths:
-        with open(filename, 'r') as f:
+        with open(filename, 'r', encoding='utf8') as f:
             pyfile = f.read()
             compile(pyfile + '\n', filename, 'exec')
 
diff --git a/.development/resources.py b/.development/resources.py
index cae7da0..2f72c56 100644
--- a/.development/resources.py
+++ b/.development/resources.py
@@ -141,7 +141,7 @@ def add_metadata(path, resources):
 
         if file:
             try:
-                with open(os.path.join(path, file), "r") as stream:
+                with open(os.path.join(path, file), "r", encoding='utf8') as stream:
                     resource.update(_normalize_metadata(read_metadata(stream)))
             except ParseException as e:
                 resource.setdefault("errors", []).append(file + ": " + str(e))
@@ -197,7 +197,7 @@ def _validate_resource(path, resource):
         if file.endswith(".py"):
             try:
                 filename = os.path.join(path, file)
-                with open(filename, 'r') as s:
+                with open(filename, 'r', encoding='utf8') as s:
                     compile(s.read() + '\n', filename, 'exec')
             except Exception as e:
                 resource.setdefault("errors", []).append(str(e))