diff --git a/Cargo.lock b/Cargo.lock
index 4be5751..09f3d5c 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4989,11 +4989,12 @@ dependencies = [
 
 [[package]]
 name = "schemars"
-version = "0.8.22"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3fbf2ae1b8bc8e02df939598064d22402220cd5bbcca1c76f7d6a310974d5615"
+checksum = "a2b42f36aa1cd011945615b92222f6bf73c599a102a300334cd7f8dbeec726cc"
 dependencies = [
  "dyn-clone",
+ "ref-cast",
  "schemars_derive",
  "serde",
  "serde_json",
@@ -5001,9 +5002,9 @@ dependencies = [
 
 [[package]]
 name = "schemars_derive"
-version = "0.8.22"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "32e265784ad618884abaea0600a9adf15393368d840e0222d101a072f3f7534d"
+checksum = "7d115b50f4aaeea07e79c1912f645c7513d81715d0420f8bc77a18c6260b307f"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Cargo.toml b/Cargo.toml
index 501efac..9b6f618 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -159,7 +159,7 @@ rand = "0.8"
 open = "5"
 
 # JSON Schema (Phase 8 MCP)
-schemars = "0.8"
+schemars = "1.2"
 axum = "0.7"
 
 # Phase 14 system integration.