diff --git a/gallery_dl/extractor/ao3.py b/gallery_dl/extractor/ao3.py
index cb582023..3bb48b50 100644
--- a/gallery_dl/extractor/ao3.py
+++ b/gallery_dl/extractor/ao3.py
@@ -69,6 +69,12 @@ class Ao3WorkExtractor(Ao3Extractor):
         url = "{}/works/{}".format(self.root, work_id)
         extr = text.extract_from(self.request(url).text)
 
+        chapters = {}
+        cindex = extr(' id="chapter_index"', "</ul>")
+        for ch in text.extract_iter(cindex, ' value="', "</option>"):
+            cid, _, cname = ch.partition('">')
+            chapters[cid] = text.unescape(cname)
+
         fmts = {}
         path = ""
         download = extr(' class="download"', "</ul>")
@@ -102,8 +108,7 @@ class Ao3WorkExtractor(Ao3Extractor):
                 path.rpartition("updated_at=")[2]),
             "words"        : text.parse_int(
                 extr('<dd class="words">', "<").replace(",", "")),
-            "chapters"     : text.parse_int(
-                extr('<dd class="chapters">', "/")),
+            "chapters"     : chapters,
             "comments"     : text.parse_int(
                 extr('<dd class="comments">', "<").replace(",", "")),
             "likes"        : text.parse_int(
diff --git a/test/results/ao3.py b/test/results/ao3.py
index 1fea4677..4fa1aa8f 100644
--- a/test/results/ao3.py
+++ b/test/results/ao3.py
@@ -16,7 +16,35 @@ __tests__ = (
 
     "author"   : "Flowers_for_ghouls",
     "bookmarks": range(100, 300),
-    "chapters" : 27,
+    "chapters": {
+        "120506833": "1. Showtime",
+        "120866506": "2. A Comedy of Errors",
+        "121739140": "3. Gifts",
+        "121941313": "4. Date Night",
+        "123054364": "5. Breaking the News",
+        "123579898": "6. Isolated Events",
+        "124258153": "7. The Home Stretch",
+        "124886536": "8. Domestic Bliss",
+        "125335270": "9. The Offer",
+        "125871166": "10. The Promise",
+        "126223879": "11. Gifts II",
+        "126692398": "12. On the Move",
+        "127471375": "13. The Fruit Vignettes",
+        "128496448": "14. Respite",
+        "128994919": "15. Changes",
+        "129492154": "16. Halloween",
+        "130379002": "17. GIfts III",
+        "131066743": "18. R.A.S.B.E.W.",
+        "131884072": "19. The Longest Night",
+        "132730264": "20. Meeting the Pack",
+        "133714876": "21. A Mystery",
+        "134663854": "22. Growing Pains",
+        "135499822": "23. Presentation Day",
+        "136500946": "24. Revelations",
+        "137857876": "25. The Retirement Plan",
+        "139463056": "26. Two Birds, One Stone",
+        "141697141": "27. New Management",
+    },
     "comments" : range(800, 2000),
     "date"     : "dt:2023-06-11 00:00:00",
     "date_completed": "dt:2024-05-10 00:00:00",