diff --git a/src/chartsheet.c b/src/chartsheet.c
index 164466d9..24c1a025 100644
--- a/src/chartsheet.c
+++ b/src/chartsheet.c
@@ -271,7 +271,6 @@ chartsheet_set_chart_opt(lxw_chartsheet *self,
         object_props->y_scale = user_options->y_scale;
     }
 
-    /* TODO. Read defaults from chart. */
     object_props->width = 480;
     object_props->height = 288;
 
diff --git a/src/packager.c b/src/packager.c
index 681eaa91..301d2b27 100644
--- a/src/packager.c
+++ b/src/packager.c
@@ -1214,7 +1214,6 @@ _write_chartsheet_rels_file(lxw_packager *self)
 
         index++;
 
-        /* TODO. This should never be empty. Put check higher up. */
         if (STAILQ_EMPTY(worksheet->external_drawing_links))
             continue;
 
diff --git a/src/workbook.c b/src/workbook.c
index ecafc16f..c43242fb 100644
--- a/src/workbook.c
+++ b/src/workbook.c
@@ -924,7 +924,7 @@ _populate_range_dimensions(lxw_workbook *self, lxw_series_range *range)
     /* Create a copy of the formula to modify and parse into parts. */
     lxw_snprintf(formula, LXW_MAX_FORMULA_RANGE_LENGTH, "%s", range->formula);
 
-    /* Check for valid formula. TODO. This needs stronger validation. */
+    /* Check for valid formula. Note, This needs stronger validation. */
     tmp_str = strchr(formula, '!');
 
     if (tmp_str == NULL) {