diff --git a/crates/spz-capnproto-rust/Cargo.toml b/crates/spz-capnproto-rust/Cargo.toml
index 0393a2a..66fec3c 100644
--- a/crates/spz-capnproto-rust/Cargo.toml
+++ b/crates/spz-capnproto-rust/Cargo.toml
@@ -35,7 +35,7 @@ rstest = { version = "0.26", default-features = true, features = [] }
 
 [build-dependencies]
 anyhow = { version = "1.0", default-features = true, features = [] }
-capnpc = { version = "0.25", default-features = true, features = [] }
+capnpc = { version = "0.26", default-features = true, features = [] }
 
 [features]
 # Convenience fns and trait impls for converting between spz and capnp types.