diff --git a/pyproject.toml b/pyproject.toml
index b61c7b73..c7f47e4d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -52,7 +52,7 @@ dev = [
     # Code Formatting & Linting (Ruff replaces Black - single tool for lint + format)
     "ruff>=0.15.0,<1.0",
     # Type Checking
-    "mypy>=1.19.1,<2.0",
+    "mypy>=1.19.1,<3.0",
     "types-PyYAML>=6.0.12.20250915",
     # Testing
     "pytest>=9.0.2",
diff --git a/requirements.txt b/requirements.txt
index 64abd181..098d01cf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -31,7 +31,7 @@ aiofiles>=25.1.0
 
 # Development Tools (from dev extra)
 ruff>=0.15.0,<1.0
-mypy>=1.19.1,<2.0
+mypy>=1.19.1,<3.0
 types-PyYAML>=6.0.12.20250915
 
 # Testing