diff --git a/codex-rs/Cargo.lock b/codex-rs/Cargo.lock
index 38ff6df18a..e0b3d618a9 100644
--- a/codex-rs/Cargo.lock
+++ b/codex-rs/Cargo.lock
@@ -1036,7 +1036,7 @@ dependencies = [
  "codex-utils-absolute-path",
  "mcp-types",
  "pretty_assertions",
- "schemars 0.8.22",
+ "schemars 1.0.4",
  "serde",
  "serde_json",
  "strum_macros 0.27.2",
@@ -1320,7 +1320,7 @@ dependencies = [
  "regex",
  "regex-lite",
  "reqwest",
- "schemars 0.8.22",
+ "schemars 1.0.4",
  "seccompiler",
  "serde",
  "serde_json",
@@ -1495,7 +1495,7 @@ dependencies = [
  "once_cell",
  "pretty_assertions",
  "regex",
- "schemars 0.8.22",
+ "schemars 1.0.4",
  "serde",
  "tempfile",
  "thiserror 2.0.17",
@@ -1577,7 +1577,7 @@ dependencies = [
  "mcp_test_support",
  "os_info",
  "pretty_assertions",
- "schemars 0.8.22",
+ "schemars 1.0.4",
  "serde",
  "serde_json",
  "shlex",
@@ -1654,7 +1654,7 @@ dependencies = [
  "mcp-types",
  "mime_guess",
  "pretty_assertions",
- "schemars 0.8.22",
+ "schemars 1.0.4",
  "serde",
  "serde_json",
  "serde_with",
@@ -1700,7 +1700,7 @@ dependencies = [
  "pretty_assertions",
  "reqwest",
  "rmcp",
- "schemars 0.8.22",
+ "schemars 1.0.4",
  "serde",
  "serde_json",
  "serial_test",
@@ -1873,7 +1873,7 @@ name = "codex-utils-absolute-path"
 version = "0.0.0"
 dependencies = [
  "path-absolutize",
- "schemars 0.8.22",
+ "schemars 1.0.4",
  "serde",
  "serde_json",
  "tempfile",
@@ -4220,7 +4220,7 @@ checksum = "47e1ffaa40ddd1f3ed91f717a33c8c0ee23fff369e3aa8772b9605cc1d22f4c3"
 name = "mcp-types"
 version = "0.0.0"
 dependencies = [
- "schemars 0.8.22",
+ "schemars 1.0.4",
  "serde",
  "serde_json",
  "ts-rs",
@@ -5895,18 +5895,6 @@ dependencies = [
  "syn 1.0.109",
 ]
 
-[[package]]
-name = "schemars"
-version = "0.8.22"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3fbf2ae1b8bc8e02df939598064d22402220cd5bbcca1c76f7d6a310974d5615"
-dependencies = [
- "dyn-clone",
- "schemars_derive 0.8.22",
- "serde",
- "serde_json",
-]
-
 [[package]]
 name = "schemars"
 version = "0.9.0"
@@ -5928,23 +5916,11 @@ dependencies = [
  "chrono",
  "dyn-clone",
  "ref-cast",
- "schemars_derive 1.0.4",
+ "schemars_derive",
  "serde",
  "serde_json",
 ]
 
-[[package]]
-name = "schemars_derive"
-version = "0.8.22"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "32e265784ad618884abaea0600a9adf15393368d840e0222d101a072f3f7534d"
-dependencies = [
- "proc-macro2",
- "quote",
- "serde_derive_internals",
- "syn 2.0.104",
-]
-
 [[package]]
 name = "schemars_derive"
 version = "1.0.4"
diff --git a/codex-rs/Cargo.toml b/codex-rs/Cargo.toml
index 8a996955e5..718ea89db9 100644
--- a/codex-rs/Cargo.toml
+++ b/codex-rs/Cargo.toml
@@ -182,7 +182,7 @@ regex = "1.12.2"
 regex-lite = "0.1.8"
 reqwest = "0.12"
 rmcp = { version = "0.12.0", default-features = false }
-schemars = "0.8.22"
+schemars = "1.0.4"
 seccompiler = "0.5.0"
 sentry = "0.46.0"
 serde = "1"