diff --git a/about.html b/about.html
index 87bb8e8..35015be 100644
--- a/about.html
+++ b/about.html
@@ -70,5 +70,8 @@
 				<p><a href="mailto:filifa.breath652@8alias.com">filifa.breath652@8alias.com</a></p>
 			</article>
 		</main>
+		<footer>
+			<p id="copyright">© 2025 filifa. This page is licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0</a>.</p>
+		</footer>
 	</body>
 </html>
diff --git a/attributions.html b/attributions.html
index da8a2c1..e17f076 100644
--- a/attributions.html
+++ b/attributions.html
@@ -42,5 +42,8 @@
 				</ul>
 			</article>
 		</main>
+		<footer>
+			<p id="copyright">© 2025 filifa. This page is licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0</a>.</p>
+		</footer>
 	</body>
 </html>
diff --git a/eulerbooks/eulerbooks.html b/eulerbooks/eulerbooks.html
index 48ae8a2..67cd02d 100644
--- a/eulerbooks/eulerbooks.html
+++ b/eulerbooks/eulerbooks.html
@@ -684,5 +684,8 @@
 				</table>
 			</article>
 		</main>
+		<footer>
+			<p id="copyright">© 2025 filifa. This page is licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0</a>.</p>
+		</footer>
 	</body>
 </html>
diff --git a/taoup/taoup.html b/taoup/taoup.html
index b9591b8..dc2670b 100644
--- a/taoup/taoup.html
+++ b/taoup/taoup.html
@@ -34,5 +34,8 @@
 				footnotes have been redone to play nicely in an epub.</p>
 			</article>
 		</main>
+		<footer>
+			<p id="copyright">© 2025 filifa. This page is licensed under <a href="https://creativecommons.org/licenses/by-sa/4.0/">CC BY-SA 4.0</a>.</p>
+		</footer>
 	</body>
 </html>