diff --git a/spiffe/Cargo.toml b/spiffe/Cargo.toml
index 74a95ca..21f9ae8 100644
--- a/spiffe/Cargo.toml
+++ b/spiffe/Cargo.toml
@@ -31,7 +31,7 @@ tonic = "0.11"
 
 # workload-api dependencies:
 prost = { version = "0.12", optional = true }
-prost-types = { version = "0.12", optional = true }
+prost-types = { version = "0.13", optional = true }
 tokio = { version = "1", features = ["net"], optional = true }
 tokio-stream = { version = "0.1", optional = true }
 tower = { version = "0.4", features = ["util"], optional = true }