diff --git a/pyproject.toml b/pyproject.toml
index e641bef..1baf721 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,7 +7,7 @@ name = "conductor"
 version = "0.5.1"
 description = "The AI-Conductor's Operating System — session lifecycle, governance runtime, product extractor"
 requires-python = ">=3.11"
-dependencies = ["pyyaml>=6.0.3", "jsonschema>=4.0"]
+dependencies = ["pyyaml>=6.0.3", "jsonschema>=4.26.0"]
 
 [project.optional-dependencies]
 dev = ["pytest>=9.1.1", "hypothesis>=6.155.6", "mypy>=2.1.0", "mcp>=1.28.0"]