diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index ed918186..1b87fae0 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -55,7 +55,7 @@ dev = [
     "mypy==1.20.0",
     "pluggy==1.6.0",
     "pylint==4.0.2",
-    "pyrefly==0.63.1",
+    "pyrefly==0.64.1",
     "pytest-asyncio==1.3.0",
     "pytest-cov==7.1.0",
     "pytest-xdist==3.8.0",
diff --git a/backend/uv.lock b/backend/uv.lock
index 3830d024..ef419ef5 100644
--- a/backend/uv.lock
+++ b/backend/uv.lock
@@ -408,7 +408,7 @@ dev = [
     { name = "mypy", specifier = "==1.20.0" },
     { name = "pluggy", specifier = "==1.6.0" },
     { name = "pylint", specifier = "==4.0.2" },
-    { name = "pyrefly", specifier = "==0.63.1" },
+    { name = "pyrefly", specifier = "==0.64.1" },
     { name = "pytest", specifier = "==9.0.3" },
     { name = "pytest-asyncio", specifier = "==1.3.0" },
     { name = "pytest-cov", specifier = "==7.1.0" },
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 [[package]]