diff --git a/arrow-flight/gen/Cargo.toml b/arrow-flight/gen/Cargo.toml
index 863f7044a153..6f594ea47867 100644
--- a/arrow-flight/gen/Cargo.toml
+++ b/arrow-flight/gen/Cargo.toml
@@ -33,5 +33,5 @@ publish = false
 # Pin specific version of the tonic-build dependencies to avoid auto-generated
 # (and checked in) arrow.flight.protocol.rs from changing
 proc-macro2 = { version = "=1.0.82", default-features = false }
-prost-build = { version = "=0.12.4", default-features = false }
+prost-build = { version = "=0.12.6", default-features = false }
 tonic-build = { version = "=0.11.0", default-features = false, features = ["transport", "prost"] }