diff --git a/pylode/profiles/ontpub.py b/pylode/profiles/ontpub.py
index 19e9f90..9f1d8da 100644
--- a/pylode/profiles/ontpub.py
+++ b/pylode/profiles/ontpub.py
@@ -136,7 +136,7 @@ def make_html(self, destination: Path = None, include_css: bool = True):
         self._make_body()
 
         if destination is not None:
-            open(destination, "w").write(self.doc.render())
+            open(destination, "w", encoding="utf8").write(self.doc.render())
         else:
             return self.doc.render()
 
diff --git a/pylode/profiles/vocpub.py b/pylode/profiles/vocpub.py
index ec80c27..ed68fd3 100644
--- a/pylode/profiles/vocpub.py
+++ b/pylode/profiles/vocpub.py
@@ -139,7 +139,7 @@ def make_html(self, destination: Path = None, include_css: bool = True):
         self._make_body()
 
         if destination is not None:
-            open(destination, "w").write(self.doc.render())
+            open(destination, "w", encoding="utf8").write(self.doc.render())
         else:
             return self.doc.render()