diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index cd33a77d3..aa7b6447a 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -28,7 +28,7 @@ dependencies = [
     "starlette==1.3.1",
     "types-aiofiles==25.1.0.20251011",
     "types-passlib==1.7.7.20241221",
-    "types-simplejson==3.20.0.20250218",
+    "types-simplejson==4.1.0.20260724",
     "uvicorn==0.51.0",
 ]
 
diff --git a/backend/uv.lock b/backend/uv.lock
index 7b6a3de78..2a6dee305 100644
--- a/backend/uv.lock
+++ b/backend/uv.lock
@@ -481,7 +481,7 @@ requires-dist = [
     { name = "starlette", specifier = "==1.3.1" },
     { name = "types-aiofiles", specifier = "==25.1.0.20251011" },
     { name = "types-passlib", specifier = "==1.7.7.20241221" },
-    { name = "types-simplejson", specifier = "==3.20.0.20250218" },
+    { name = "types-simplejson", specifier = "==4.1.0.20260724" },
     { name = "uvicorn", specifier = "==0.51.0" },
 ]
 
@@ -1798,11 +1798,11 @@ wheels = [
 
 [[package]]
 name = "types-simplejson"
-version = "3.20.0.20250218"
+version = "4.1.0.20260724"
 source = { registry = "https://pypi.org/simple" }
-sdist = { url = "https://files.pythonhosted.org/packages/2a/b0/a2e4a46af6b4822b1a281b9ddcaba2451f7ceec0b114b09b1ee9d45ae90b/types_simplejson-3.20.0.20250218.tar.gz", hash = "sha256:5c5c46f67690f211d628d5182546b43ea9ff03936efd759549ac1795b213e3e7", size = 9824, upload-time = "2025-02-18T02:40:35.759Z" }
+sdist = { url = "https://files.pythonhosted.org/packages/1d/42/1916db531db4130e4c3dc5df35144d2cb018c9f24895743f36c5cb35da6f/types_simplejson-4.1.0.20260724.tar.gz", hash = "sha256:62045f0b81581e714641c486c9238088eacaa3310b7873e05b89999664b64934", size = 11069, upload-time = "2026-07-24T04:58:39.843Z" }
 wheels = [
-    { url = "https://files.pythonhosted.org/packages/68/8f/4eb139636659bd906483809a3be7e280c56d88eb9023ea1cf5b9e8acd82e/types_simplejson-3.20.0.20250218-py3-none-any.whl", hash = "sha256:dbe00ea8497f8ba2f91dd9654d7064613cc09df545e5a008e8240fc6a407e98f", size = 10333, upload-time = "2025-02-18T02:40:34.876Z" },
+    { url = "https://files.pythonhosted.org/packages/c4/fc/64b8f433237ba4bb1b204f83be37b4954de187e334e36ecce78851045f60/types_simplejson-4.1.0.20260724-py3-none-any.whl", hash = "sha256:160e894bb546ccf8455d34512f5fa7edf2aa25c047a43be840dde3a7bf3e4388", size = 10583, upload-time = "2026-07-24T04:58:38.994Z" },
 ]
 
 [[package]]