diff --git a/crate_universe/Cargo.lock b/crate_universe/Cargo.lock
index c1cdd19f0a..f0602c2e51 100644
--- a/crate_universe/Cargo.lock
+++ b/crate_universe/Cargo.lock
@@ -249,9 +249,9 @@ dependencies = [
 
 [[package]]
 name = "cargo_toml"
-version = "0.17.1"
+version = "0.19.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4d1ece59890e746567b467253aea0adbe8a21784d0b025d8a306f66c391c2957"
+checksum = "3dc9f7a067415ab5058020f04c60ec7b557084dbec0e021217bbabc7a8d38d14"
 dependencies = [
  "serde",
  "toml 0.8.6",
diff --git a/crate_universe/Cargo.toml b/crate_universe/Cargo.toml
index 0608275dab..4ee1b6af68 100644
--- a/crate_universe/Cargo.toml
+++ b/crate_universe/Cargo.toml
@@ -28,7 +28,7 @@ default = ["cargo"]
 anyhow = "1.0.75"
 camino = "1.1.6"
 cargo_metadata = "0.18.1"
-cargo_toml = "0.17.1"
+cargo_toml = "0.19.1"
 cargo-lock = "9.0.0"
 cargo-platform = "0.1.4"
 cfg-expr = "0.15.5"
diff --git a/crate_universe/src/splicing/splicer.rs b/crate_universe/src/splicing/splicer.rs
index 620036b58c..6a2f2e0fcf 100644
--- a/crate_universe/src/splicing/splicer.rs
+++ b/crate_universe/src/splicing/splicer.rs
@@ -478,7 +478,7 @@ impl<'a> SplicerKind<'a> {
         for (name, details) in direct_packages_manifest.iter() {
             manifest.dependencies.insert(
                 name.clone(),
-                cargo_toml::Dependency::Detailed(details.clone()),
+                cargo_toml::Dependency::Detailed(Box::new(details.clone())),
             );
         }
 
diff --git a/crate_universe/test_data/serialized_configs/BUILD.bazel b/crate_universe/test_data/serialized_configs/BUILD.bazel
index c68bc48936..ae1ab66d75 100644
--- a/crate_universe/test_data/serialized_configs/BUILD.bazel
+++ b/crate_universe/test_data/serialized_configs/BUILD.bazel
@@ -50,7 +50,7 @@ write_file(
         packages = {
             "cargo_toml": crate.spec(
                 git = "https://gitlab.com/crates.rs/cargo_toml.git",
-                tag = "v0.15.2",
+                tag = "v0.19.1",
             ),
             "cfg-if": crate.spec(
                 git = "https://github.com/rust-lang/cfg-if.git",