diff --git a/Cargo.toml b/Cargo.toml
index 61183799..9bd1a374 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,6 +5,7 @@ resolver = "2"
 [workspace.package]
 version = "0.1.0"
 edition = "2021"
+rust-version = "1.95"
 license = "MIT OR Apache-2.0"
 repository = "https://github.com/braintrustdata/lingua"
 
diff --git a/crates/anonymize/Cargo.toml b/crates/anonymize/Cargo.toml
index 2267dfd1..d90e8148 100644
--- a/crates/anonymize/Cargo.toml
+++ b/crates/anonymize/Cargo.toml
@@ -2,6 +2,7 @@
 name = "anonymize"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 license.workspace = true
 repository.workspace = true
 description = "JSON anonymization utilities for Lingua payloads"
diff --git a/crates/braintrust-llm-router/Cargo.toml b/crates/braintrust-llm-router/Cargo.toml
index bdd9b283..1ea849a7 100644
--- a/crates/braintrust-llm-router/Cargo.toml
+++ b/crates/braintrust-llm-router/Cargo.toml
@@ -4,7 +4,7 @@ version.workspace = true
 edition.workspace = true
 license.workspace = true
 repository.workspace = true
-rust-version = "1.75"
+rust-version.workspace = true
 authors = ["Braintrust Team <team@braintrust.dev>"]
 description = "High-performance Rust library for routing requests to various LLM providers"
 documentation = "https://docs.rs/braintrust-llm-router"
diff --git a/crates/coverage-report/Cargo.toml b/crates/coverage-report/Cargo.toml
index 5e78e03a..9d918e82 100644
--- a/crates/coverage-report/Cargo.toml
+++ b/crates/coverage-report/Cargo.toml
@@ -2,6 +2,7 @@
 name = "coverage-report"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 publish = false
 description = "Cross-provider transformation coverage report generator for Lingua"
 
diff --git a/crates/generate-types/Cargo.toml b/crates/generate-types/Cargo.toml
index ab91dc54..bf7defc1 100644
--- a/crates/generate-types/Cargo.toml
+++ b/crates/generate-types/Cargo.toml
@@ -2,6 +2,7 @@
 name = "generate-types"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 description = "Type generation tool for Lingua providers"
 publish = false
 
diff --git a/crates/lingua/Cargo.toml b/crates/lingua/Cargo.toml
index f3089c61..4c326e1b 100644
--- a/crates/lingua/Cargo.toml
+++ b/crates/lingua/Cargo.toml
@@ -2,6 +2,7 @@
 name = "lingua"
 version.workspace = true
 edition.workspace = true
+rust-version.workspace = true
 license.workspace = true
 repository.workspace = true
 description = "Lingua - Universal message format for LLM APIs"
diff --git a/serde_json/Cargo.toml b/serde_json/Cargo.toml
index b6860c44..c150aeb8 100644
--- a/serde_json/Cargo.toml
+++ b/serde_json/Cargo.toml
@@ -2,6 +2,7 @@
 name = "big_serde_json"
 version = "0.1.0"
 edition = "2021"
+rust-version = "1.95"
 description = "Wrapper for serde_json with arbitrary_precision feature"
 
 [dependencies]