diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 1c469c2358..2a5c7c27d6 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -84,7 +84,7 @@ dependencies = [
     "l18n<2022.0,>=2021.3",
     "wagtail==7.1.2",
     "wagtail-localize==1.10",
-    "celery==5.4.0",
+    "celery==5.5.3",
     "wagtail-headless-preview==0.8.0",
     "Jinja2>=3.1.3",
     "icalendar>=5.0.11",
diff --git a/backend/uv.lock b/backend/uv.lock
index 1a549a0314..07fec9c5e6 100644
--- a/backend/uv.lock
+++ b/backend/uv.lock
@@ -211,7 +211,7 @@ requires-dist = [
     { name = "aniso8601", specifier = "==9.0.1" },
     { name = "argon2-cffi", specifier = ">=23.1.0,<24.0.0" },
     { name = "boto3", specifier = "==1.35.76" },
-    { name = "celery", specifier = "==5.4.0" },
+    { name = "celery", specifier = "==5.5.3" },
     { name = "certifi", specifier = "==2024.7.4" },
     { name = "chardet", specifier = "==5.2.0" },
     { name = "countries", specifier = ">=0.2.0,<1.0.0" },
@@ -404,7 +404,7 @@ wheels = [
 
 [[package]]
 name = "celery"
-version = "5.4.0"
+version = "5.5.3"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "billiard" },
@@ -414,12 +414,11 @@ dependencies = [
     { name = "click-repl" },
     { name = "kombu" },
     { name = "python-dateutil" },
-    { name = "tzdata" },
     { name = "vine" },
 ]
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+sdist = { url = "https://files.pythonhosted.org/packages/bb/7d/6c289f407d219ba36d8b384b42489ebdd0c84ce9c413875a8aae0c85f35b/celery-5.5.3.tar.gz", hash = "sha256:6c972ae7968c2b5281227f01c3a3f984037d21c5129d07bf3550cc2afc6b10a5", size = 1667144, upload-time = "2025-06-01T11:08:12.563Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/90/c4/6a4d3772e5407622feb93dd25c86ce3c0fee746fa822a777a627d56b4f2a/celery-5.4.0-py3-none-any.whl", hash = "sha256:369631eb580cf8c51a82721ec538684994f8277637edde2dfc0dacd73ed97f64", size = 425983, upload-time = "2024-04-17T20:29:39.406Z" },
+    { url = "https://files.pythonhosted.org/packages/c9/af/0dcccc7fdcdf170f9a1585e5e96b6fb0ba1749ef6be8c89a6202284759bd/celery-5.5.3-py3-none-any.whl", hash = "sha256:0b5761a07057acee94694464ca482416b959568904c9dfa41ce8413a7d65d525", size = 438775, upload-time = "2025-06-01T11:08:09.94Z" },
 ]
 
 [[package]]
@@ -1376,16 +1375,17 @@ wheels = [
 
 [[package]]
 name = "kombu"
-version = "5.4.2"
+version = "5.5.4"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "amqp" },
+    { name = "packaging" },
     { name = "tzdata" },
     { name = "vine" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/38/4d/b93fcb353d279839cc35d0012bee805ed0cf61c07587916bfc35dbfddaf1/kombu-5.4.2.tar.gz", hash = "sha256:eef572dd2fd9fc614b37580e3caeafdd5af46c1eff31e7fba89138cdb406f2cf", size = 442858, upload-time = "2024-09-19T12:25:37.261Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/0f/d3/5ff936d8319ac86b9c409f1501b07c426e6ad41966fedace9ef1b966e23f/kombu-5.5.4.tar.gz", hash = "sha256:886600168275ebeada93b888e831352fe578168342f0d1d5833d88ba0d847363", size = 461992, upload-time = "2025-06-01T10:19:22.281Z" }
 wheels = [
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+    { url = "https://files.pythonhosted.org/packages/ef/70/a07dcf4f62598c8ad579df241af55ced65bed76e42e45d3c368a6d82dbc1/kombu-5.5.4-py3-none-any.whl", hash = "sha256:a12ed0557c238897d8e518f1d1fdf84bd1516c5e305af2dacd85c2015115feb8", size = 210034, upload-time = "2025-06-01T10:19:20.436Z" },
 ]
 
 [[package]]
@@ -2564,11 +2564,11 @@ wheels = [
 
 [[package]]
 name = "tzdata"
-version = "2024.2"
+version = "2025.2"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/e1/34/943888654477a574a86a98e9896bae89c7aa15078ec29f490fef2f1e5384/tzdata-2024.2.tar.gz", hash = "sha256:7d85cc416e9382e69095b7bdf4afd9e3880418a2413feec7069d533d6b4e31cc", size = 193282, upload-time = "2024-09-23T18:56:46.89Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/95/32/1a225d6164441be760d75c2c42e2780dc0873fe382da3e98a2e1e48361e5/tzdata-2025.2.tar.gz", hash = "sha256:b60a638fcc0daffadf82fe0f57e53d06bdec2f36c4df66280ae79bce6bd6f2b9", size = 196380, upload-time = "2025-03-23T13:54:43.652Z" }
 wheels = [
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+    { url = "https://files.pythonhosted.org/packages/5c/23/c7abc0ca0a1526a0774eca151daeb8de62ec457e77262b66b359c3c7679e/tzdata-2025.2-py2.py3-none-any.whl", hash = "sha256:1a403fada01ff9221ca8044d701868fa132215d84beb92242d9acd2147f667a8", size = 347839, upload-time = "2025-03-23T13:54:41.845Z" },
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 [[package]]