diff --git a/Cargo.toml b/Cargo.toml
index 9226aca03..60178306c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -111,6 +111,7 @@ rev = "de226a26e8e18edbdb1d6f986afe37bbbf35fbf4"
 version = "0.0.0"
 edition = "2021"
 publish = false
+rust-version = "1.81.0"
 
 # min-sized-rustを元にrelease buildのサイズが小さくなるようにした
 # https://github.com/johnthagen/min-sized-rust
diff --git a/crates/downloader/Cargo.toml b/crates/downloader/Cargo.toml
index 427a1854d..d86d4f7a8 100644
--- a/crates/downloader/Cargo.toml
+++ b/crates/downloader/Cargo.toml
@@ -1,6 +1,7 @@
 [package]
 name = "downloader"
 edition.workspace = true
+rust-version.workspace = true
 
 [[bin]]
 name = "download"
diff --git a/crates/test_util/Cargo.toml b/crates/test_util/Cargo.toml
index 329d5f603..5a6bbd7a4 100644
--- a/crates/test_util/Cargo.toml
+++ b/crates/test_util/Cargo.toml
@@ -1,6 +1,7 @@
 [package]
 name = "test_util"
 edition.workspace = true
+rust-version.workspace = true
 
 [dependencies]
 libloading.workspace = true
diff --git a/crates/voicevox_core/Cargo.toml b/crates/voicevox_core/Cargo.toml
index 8390e1de3..8052b312a 100644
--- a/crates/voicevox_core/Cargo.toml
+++ b/crates/voicevox_core/Cargo.toml
@@ -3,6 +3,7 @@ name = "voicevox_core"
 version.workspace = true
 edition.workspace = true
 publish.workspace = true
+rust-version.workspace = true
 
 [package.metadata.docs.rs]
 features = ["load-onnxruntime", "link-onnxruntime"]
diff --git a/crates/voicevox_core_c_api/Cargo.toml b/crates/voicevox_core_c_api/Cargo.toml
index 1b74bfdf5..e03d6cc4f 100644
--- a/crates/voicevox_core_c_api/Cargo.toml
+++ b/crates/voicevox_core_c_api/Cargo.toml
@@ -3,6 +3,7 @@ name = "voicevox_core_c_api"
 version.workspace = true
 edition.workspace = true
 publish.workspace = true
+rust-version.workspace = true
 
 [lib]
 crate-type = ["cdylib"]
diff --git a/crates/voicevox_core_java_api/Cargo.toml b/crates/voicevox_core_java_api/Cargo.toml
index aed67c058..a34d4220a 100644
--- a/crates/voicevox_core_java_api/Cargo.toml
+++ b/crates/voicevox_core_java_api/Cargo.toml
@@ -3,6 +3,7 @@ name = "voicevox_core_java_api"
 version.workspace = true
 edition.workspace = true
 publish.workspace = true
+rust-version.workspace = true
 
 [lib]
 crate-type = ["cdylib"]
diff --git a/crates/voicevox_core_macros/Cargo.toml b/crates/voicevox_core_macros/Cargo.toml
index 0f8362e77..1be131d65 100644
--- a/crates/voicevox_core_macros/Cargo.toml
+++ b/crates/voicevox_core_macros/Cargo.toml
@@ -3,6 +3,7 @@ name = "voicevox_core_macros"
 version.workspace = true
 edition.workspace = true
 publish.workspace = true
+rust-version.workspace = true
 
 [lib]
 name = "macros"
diff --git a/crates/voicevox_core_python_api/Cargo.toml b/crates/voicevox_core_python_api/Cargo.toml
index a2c6f7405..00e1e0d4e 100644
--- a/crates/voicevox_core_python_api/Cargo.toml
+++ b/crates/voicevox_core_python_api/Cargo.toml
@@ -3,6 +3,7 @@ name = "voicevox_core_python_api"
 version = "0.0.0"
 edition.workspace = true
 publish.workspace = true
+rust-version.workspace = true
 
 [lib]
 crate-type = ["cdylib"]
diff --git a/crates/xtask/Cargo.toml b/crates/xtask/Cargo.toml
index 63d14515a..9fafb2aec 100644
--- a/crates/xtask/Cargo.toml
+++ b/crates/xtask/Cargo.toml
@@ -1,6 +1,7 @@
 [package]
 name = "xtask"
 edition.workspace = true
+rust-version.workspace = true
 
 [dependencies]
 cbindgen.workspace = true
diff --git a/renovate.json5 b/renovate.json5
index 6fc45ac18..0d1e00acd 100644
--- a/renovate.json5
+++ b/renovate.json5
@@ -86,5 +86,17 @@
       packageNameTemplate: "rust-lang/rust",
       datasourceTemplate: "github-tags",
     },
+    {
+      customType: "regex",
+      fileMatch: [
+        "^Cargo.toml$",
+      ],
+      matchStrings: [
+        "rust-version = \"(?<currentValue>\\d+\\.\\d+\\.\\d+)\"",
+      ],
+      depNameTemplate: "Rust",
+      packageNameTemplate: "rust-lang/rust",
+      datasourceTemplate: "github-tags",
+    },
   ],
 }