diff --git a/Cargo.lock b/Cargo.lock
index 783a1f0..71ee1b6 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -395,7 +395,7 @@ checksum = "42703706b716c37f96a77aea830392ad231f44c9e9a67872fa5548707e11b11c"
 
 [[package]]
 name = "function-sdk-rust"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "bytes",
  "clap",
@@ -405,6 +405,7 @@ dependencies = [
  "pbjson-types",
  "prometheus-client",
  "prost",
+ "rustls",
  "serde",
  "serde_json",
  "sha2",
diff --git a/sdk/Cargo.toml b/sdk/Cargo.toml
index d81bee7..8240015 100644
--- a/sdk/Cargo.toml
+++ b/sdk/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "function-sdk-rust"
-version = "0.3.0"
+version = "0.3.1"
 edition.workspace = true
 license.workspace = true
 description = "A Rust SDK for writing Crossplane composition functions"
@@ -31,6 +31,8 @@ tower-service = "0.3"
 tracing-subscriber = { version = "0.3", features = ["json"] }
 sha2 = "0.11"
 thiserror = "2"
+# Not used directly: raises the transitive rustls floor past RUSTSEC-2026-0285.
+rustls = { version = "0.23.45", default-features = false }
 
 [dev-dependencies]
 tokio-test = "0.4"