diff --git a/metadata_checks/Cargo.toml b/metadata_checks/Cargo.toml
index 399cd3c..1c05d50 100644
--- a/metadata_checks/Cargo.toml
+++ b/metadata_checks/Cargo.toml
@@ -5,6 +5,6 @@ edition = "2021"
 publish = false
 
 [dev-dependencies]
-cargo_toml = "0.13.3"
+cargo_toml = ">= 0.13.3, <= 0.16"
 serde = "1"
 serde_yaml = "0.9"
diff --git a/num_enum_derive/Cargo.toml b/num_enum_derive/Cargo.toml
index 6e28210..357cd63 100644
--- a/num_enum_derive/Cargo.toml
+++ b/num_enum_derive/Cargo.toml
@@ -33,7 +33,7 @@ features = ["external_doc"]
 
 [dependencies]
 proc-macro2 = "1.0.60"
-proc-macro-crate = { version = "1", optional = true }
+proc-macro-crate = { version = ">= 1, <= 2", optional = true }
 quote = "1"
 syn = { version = "2", features = ["parsing"] }