diff --git a/poetry.lock b/poetry.lock
index a583137..fecc78f 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -1027,14 +1027,14 @@ i18n = ["Babel (>=2.7)"]
 
 [[package]]
 name = "logfire"
-version = "3.24.2"
+version = "4.0.0"
 description = "The best Python observability tool! 🪵🔥"
 optional = false
 python-versions = ">=3.9"
 groups = ["main"]
 files = [
-    {file = "logfire-3.24.2-py3-none-any.whl", hash = "sha256:c3a119769f8f5f1fabb6f23722125b26f987d7adeecfa9c6a90265161e6f5597"},
-    {file = "logfire-3.24.2.tar.gz", hash = "sha256:814533697890ac94b0669360e974e75f491bf5b2d9be7a1a5bbf5e1d66989d20"},
+    {file = "logfire-4.0.0-py3-none-any.whl", hash = "sha256:4e50887d61954f849ec05343ca71b29fec5c0b6e4e945cabbceed664e37966e7"},
+    {file = "logfire-4.0.0.tar.gz", hash = "sha256:64d95fbf0f05c99a8b4c99a35b5b2971f11adbfbe9a73726df11d01c12f9959c"},
 ]
 
 [package.dependencies]
@@ -2763,4 +2763,4 @@ test = ["pytest"]
 [metadata]
 lock-version = "2.1"
 python-versions = "^3.12"
-content-hash = "b16ccfae0a8e44c3f074b71930bd53ecb0cebea43357a3022d91f7398932aa92"
+content-hash = "bae2b8e1f9deed45e618dc595b3f60d9db923eae2ce1e27e3a5ef0ddb6596728"
diff --git a/pyproject.toml b/pyproject.toml
index ba87de4..7b0f61e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,7 +11,7 @@ package-mode = false
 python = "^3.12"
 fastapi = {extras = ["standard"], version = "^0.116.0"}
 weasyprint = "^63.0"
-logfire = {extras = ["fastapi"], version = "^3.0.0"}
+logfire = {extras = ["fastapi"], version = "^4.0.0"}
 
 [tool.poetry.group.dev.dependencies]
 pytest = "^8.3.3"