diff --git a/pyproject.toml b/pyproject.toml
index c152fb361..f94e4199f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -100,7 +100,7 @@ dependencies = [
     "highdicom>=0.26.1,<1; python_version < '3.14'", # transitive dependency pyjpegls not yet supporting Python 3.14
     "html-sanitizer>=2.6.0,<3",
     "httpx>=0.28.1,<1",
-    "idc-index-data==23.2.7",
+    "idc-index-data==23.8.0",
     "ijson>=3.4.0.post0,<4",
     "jsf>=0.11.2,<1",
     "jsonschema[format-nongpl]>=4.25.1,<5",
diff --git a/uv.lock b/uv.lock
index 57b6c35a3..fe66eba82 100644
--- a/uv.lock
+++ b/uv.lock
@@ -177,7 +177,7 @@ requires-dist = [
     { name = "html-sanitizer", specifier = ">=2.6.0,<3" },
     { name = "httpx", specifier = ">=0.28.1,<1" },
     { name = "humanize", specifier = ">=4.14.0,<5" },
-    { name = "idc-index-data", specifier = "==23.2.7" },
+    { name = "idc-index-data", specifier = "==23.8.0" },
     { name = "ijson", specifier = ">=3.4.0.post0,<4" },
     { name = "ipython", marker = "extra == 'marimo'", specifier = ">=9.8.0,<10" },
     { name = "jsf", specifier = ">=0.11.2,<1" },
@@ -2672,14 +2672,14 @@ wheels = [
 
 [[package]]
 name = "idc-index-data"
-version = "23.2.7"
+version = "23.8.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "google-cloud-bigquery" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/75/ef/19561fcbf3275363216ba0b3d22d1933c00dd4ede31dc358636f97585104/idc_index_data-23.2.7.tar.gz", hash = "sha256:eae08cd824a22d8036b538c2e90a5d4864f2df7d94511cb3067d87e55ad3a005", size = 85316444, upload-time = "2026-01-05T18:12:49.397Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/d1/98/6d7d2dbcec527a49f4e3672a92337947aa6c36b4469424160e5f0a98c9c6/idc_index_data-23.8.0.tar.gz", hash = "sha256:5da1a24862603c5a2a79e83be9f2a37a2dd3fbc82754d1b296bfae4c2756cb5e", size = 85501843, upload-time = "2026-03-07T20:45:40.169Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/ad/23/c4d2e2d465d0f8a3339a4e5b2b340a1e85ff7f5e071a4f852c3d702ea65e/idc_index_data-23.2.7-py3-none-any.whl", hash = "sha256:bb6874a69abb43857d664fd5904bc5cbc85035341dab18bbb518dae6496c2f6a", size = 85299983, upload-time = "2026-01-05T18:12:43.565Z" },
+    { url = "https://files.pythonhosted.org/packages/4e/ae/24f0709e7ebf4cf34498c2033b40ee432a30eb99b94867f07cc81f5def65/idc_index_data-23.8.0-py3-none-any.whl", hash = "sha256:3f4c5041ffbef90ff2b58dec8d624d721735bb0978fc46835f9fcbeff4b0667e", size = 85481969, upload-time = "2026-03-07T20:45:35.421Z" },
 ]
 
 [[package]]