diff --git a/shared_strings.go b/shared_strings.go
index d792772..cf4d121 100644
--- a/shared_strings.go
+++ b/shared_strings.go
@@ -38,7 +38,7 @@ func (sv *sharedStringsValue) String() string {
 // Reset zeroes data inside struct.
 func (sv *sharedStringsValue) Reset() {
 	sv.Text = ""
-	sv.RichText = sv.RichText[0:]
+	sv.RichText = sv.RichText[:0]
 }
 
 // Sentinel error to indicate that no shared strings file can be found
diff --git a/shared_strings_test.go b/shared_strings_test.go
index 7c4c163..8c3ce20 100644
--- a/shared_strings_test.go
+++ b/shared_strings_test.go
@@ -42,4 +42,12 @@ func TestLoadingSharedStrings(t *testing.T) {
 			require.Equal(t, []string{"rec_id", "culture", "sex"}, actual.sharedStrings)
 		})
 	}
+
+	t.Run("bold", func(t *testing.T) {
+		actual, err := OpenFile("./test/test-bold.xlsx")
+		require.NoError(t, err)
+		defer actual.Close()
+
+		require.Equal(t, []string{"Contact ID", "Phone Number"}, actual.sharedStrings)
+	})
 }
diff --git a/test/test-bold.xlsx b/test/test-bold.xlsx
new file mode 100644
index 0000000..6c9ba4a
Binary files /dev/null and b/test/test-bold.xlsx differ