diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 5aee8a095e..9c708a1555 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -59,7 +59,7 @@ dependencies = [
     "uwsgi==2.0.30",
     "django-storages==1.14.4",
     "sentry-sdk>=2.14.0",
-    "boto3==1.35.76",
+    "boto3==1.43.9",
     "pycountry<20.0,>=19.8",
     "countries<1.0.0,>=0.2.0",
     "django-ses==4.1.1",
diff --git a/backend/uv.lock b/backend/uv.lock
index 7e2d779088..ce543dca31 100644
--- a/backend/uv.lock
+++ b/backend/uv.lock
@@ -222,7 +222,7 @@ requires-dist = [
     { name = "aniso8601", specifier = "==9.0.1" },
     { name = "argon2-cffi", specifier = ">=23.1.0,<24.0.0" },
     { name = "bertopic", specifier = ">=0.16.0" },
-    { name = "boto3", specifier = "==1.35.76" },
+    { name = "boto3", specifier = "==1.43.9" },
     { name = "celery", specifier = "==5.6.3" },
     { name = "certifi", specifier = "==2024.7.4" },
     { name = "chardet", specifier = "==5.2.0" },
@@ -366,30 +366,30 @@ css = [
 
 [[package]]
 name = "boto3"
-version = "1.35.76"
+version = "1.43.9"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "botocore" },
     { name = "jmespath" },
     { name = "s3transfer" },
 ]
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+sdist = { url = "https://files.pythonhosted.org/packages/b4/cc/42d798fc5305e4636170b50cdfb305ff0a81f470e35131f4a0d2641976ae/boto3-1.43.9.tar.gz", hash = "sha256:37dac72f2921095378c0200caf07918d5e10a82b7c1f611abb70e44f69d0b962", size = 113135, upload-time = "2026-05-15T19:28:31.167Z" }
 wheels = [
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+    { url = "https://files.pythonhosted.org/packages/f4/dc/51286e9551f7852a79ce5d2a57468d9d905c30d32bcace55204551db202d/boto3-1.43.9-py3-none-any.whl", hash = "sha256:5e967292d361482793471bd80fad1e714515b7401f65a0d5b4aa6ef9d009c030", size = 140523, upload-time = "2026-05-15T19:28:28.948Z" },
 ]
 
 [[package]]
 name = "botocore"
-version = "1.35.76"
+version = "1.43.9"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "jmespath" },
     { name = "python-dateutil" },
     { name = "urllib3" },
 ]
-sdist = { url = "https://files.pythonhosted.org/packages/bb/73/c3f127c48869a3555e59c5cd381de119d96a02912dc789443fdaefa44807/botocore-1.35.76.tar.gz", hash = "sha256:a75a42ae53395796b8300c5fefb2d65a8696dc40dc85e49cf3a769e0c0202b13", size = 13439455, upload-time = "2024-12-05T02:29:50.361Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/ca/e8/f696c80982685a4cdb3df5f0781919afa50262f40e1aac7066c9c2520deb/botocore-1.43.9.tar.gz", hash = "sha256:93e91c7160678182860f5902ee4cfe6d643cac0d9ee84d3eb65becc9f4c00228", size = 15357963, upload-time = "2026-05-15T19:28:19.342Z" }
 wheels = [
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+    { url = "https://files.pythonhosted.org/packages/77/c9/a1b51a74d476f5cb2f555ce8274f0f6b9fb21d75cc3f57b87dd0632ee17a/botocore-1.43.9-py3-none-any.whl", hash = "sha256:b9bdcd9c87fc552aad30006f00167d9ebb3480e1b06f1902bac5b2c41014fdab", size = 15039827, upload-time = "2026-05-15T19:28:14.543Z" },
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 [[package]]
@@ -2372,7 +2372,7 @@ name = "pexpect"
 version = "4.9.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
-    { name = "ptyprocess" },
+    { name = "ptyprocess", marker = "sys_platform != 'emscripten' and sys_platform != 'win32'" },
 ]
 sdist = { url = "https://files.pythonhosted.org/packages/42/92/cc564bf6381ff43ce1f4d06852fc19a2f11d180f23dc32d9588bee2f149d/pexpect-4.9.0.tar.gz", hash = "sha256:ee7d41123f3c9911050ea2c2dac107568dc43b2d3b0c7557a33212c398ead30f", size = 166450, upload-time = "2023-11-25T09:07:26.339Z" }
 wheels = [
@@ -3033,14 +3033,14 @@ wheels = [
 
 [[package]]
 name = "s3transfer"
-version = "0.10.4"
+version = "0.17.0"
 source = { registry = "https://pypi.org/simple" }
 dependencies = [
     { name = "botocore" },
 ]
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 [[package]]