diff --git a/services/account_unification/pyproject.toml b/services/account_unification/pyproject.toml
index d345f87..b22032a 100644
--- a/services/account_unification/pyproject.toml
+++ b/services/account_unification/pyproject.toml
@@ -10,7 +10,7 @@ readme = "README.md"
 requires-python = ">=3.11"
 license = { text = "Apache-2.0" }
 dependencies = [
-    "fastapi==0.139.0",
+    "fastapi==0.140.13",
     "pydantic==2.13.4",
     "httpx==0.28.1",
     "pyyaml==6.0.3",
diff --git a/services/account_unification/requirements-dev.txt b/services/account_unification/requirements-dev.txt
index c67be77..30f4c67 100644
--- a/services/account_unification/requirements-dev.txt
+++ b/services/account_unification/requirements-dev.txt
@@ -37,9 +37,9 @@ colorama==0.4.6 \
     #   click
     #   interrogate
     #   pytest
-fastapi==0.139.0 \
-    --hash=sha256:99ab7b2d92223c76d6cf10757ab3f89d45b38267fc20b2a136cf02f6beac3145 \
-    --hash=sha256:cf15e1e9e667ddb0ad63811e60bd11390d1aac838ca4a7a23f421807b2308189
+fastapi==0.140.13 \
+    --hash=sha256:500172a08cf1459901f90b05c37d93060dada3b573fec8f0862445db52ba6b4b \
+    --hash=sha256:8b017110e1e9f30a95e8bdb8f71fbe2f0fe3af5717109e5b14f9e069df54f6d4
     # via cwl-idp-account-unification
 h11==0.16.0 \
     --hash=sha256:4e35b956cf45792e4caa5885e69fba00bdbc6ffafbfa020300e549b208ee5ff1 \