diff --git a/services/commtest/Cargo.lock b/services/commtest/Cargo.lock
--- a/services/commtest/Cargo.lock
+++ b/services/commtest/Cargo.lock
@@ -35,6 +35,12 @@
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c4872d67bab6358e59559027aa3b9157c53d9358c51423c17554809a8858e0f8"
 
+[[package]]
+name = "bytesize"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c58ec36aac5066d5ca17df51b3e70279f5670a72102f5752cb7e7c856adfc70"
+
 [[package]]
 name = "cfg-if"
 version = "1.0.0"
@@ -45,6 +51,7 @@
 name = "commtest"
 version = "0.1.0"
 dependencies = [
+ "bytesize",
  "tonic-build",
 ]
 
diff --git a/services/commtest/Cargo.toml b/services/commtest/Cargo.toml
--- a/services/commtest/Cargo.toml
+++ b/services/commtest/Cargo.toml
@@ -4,6 +4,7 @@
 edition = "2021"
 
 [dependencies]
+bytesize = "1.1.0"
 
 [build-dependencies]
 tonic-build = "0.6"