diff --git a/Cargo.lock b/Cargo.lock
index e2ba673..172c4b6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -8,12 +8,6 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
 
-[[package]]
-name = "convert_case"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6245d59a3e82a7fc217c5828a6692dbc6dfb63a0c8c90495621f7b9d79704a0e"
-
 [[package]]
 name = "derive-try"
 version = "0.1.0"
@@ -27,11 +21,19 @@ dependencies = [
 
 [[package]]
 name = "derive_more"
-version = "0.99.18"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "10b768e943bed7bf2cab53df09f4bc34bfd217cdb57d971e769874c9a6710618"
+dependencies = [
+ "derive_more-impl",
+]
+
+[[package]]
+name = "derive_more-impl"
+version = "2.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5f33878137e4dafd7fa914ad4e259e18a4e8e532b9617a2d0150262bf53abfce"
+checksum = "6d286bfdaf75e988b4a78e013ecd79c581e06399ab53fbacd2d916c2f904f30b"
 dependencies = [
- "convert_case",
  "proc-macro2",
  "quote",
  "rustc_version",
diff --git a/Cargo.toml b/Cargo.toml
index b19346e..06b047a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,4 +19,4 @@ syn = "2.0"
 
 [dev-dependencies]
 num = "0.4.3"
-derive_more = "0.99.18"
+derive_more = "2.1.0"