diff --git a/Cargo.toml b/Cargo.toml
index f60fe2c45..966fd4c44 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -129,7 +129,7 @@ num-traits = "0.2"
 num_enum = "0.7.2"
 paste = "1"
 pin-project = "1.1.2"
-prometheus = "0.13"
+prometheus = { version = "0.13", features = ["process"] }
 prometheus_exporter = "0.8"
 prost = { version = "0.11" }
 quickcheck = "1"