diff --git a/backend/pyproject.toml b/backend/pyproject.toml
index 5a79ca0..bf0473f 100644
--- a/backend/pyproject.toml
+++ b/backend/pyproject.toml
@@ -41,7 +41,7 @@ dev = [
     "pytest-asyncio>=0.24.0",
     "pytest-cov>=6.0",
     "ruff>=0.8.0",
-    "mypy>=1.13.0",
+    "mypy>=1.20.1",
     "respx>=0.21.0",
 ]
 
@@ -94,6 +94,6 @@ dev = [
     "pytest-asyncio>=0.24.0",
     "pytest-cov>=6.0",
     "ruff>=0.8.0",
-    "mypy>=1.13.0",
+    "mypy>=1.20.1",
     "respx>=0.22.0",
 ]