diff --git a/recipe.py b/recipe.py
index e204d3f..40752f9 100644
--- a/recipe.py
+++ b/recipe.py
@@ -14,7 +14,7 @@ class TableCell:
 
     def to_html(self):
         if self.is_header:
-            html = f"<th title={self.description}>{self.name}</th>"
+            html = f"<th title='{self.description}'>{self.name}</th>"
         elif not self.name:
             html = f'<td colspan="{self.colspan}" class="filler"></td>'
         else: