diff --git a/plume-models/Cargo.toml b/plume-models/Cargo.toml
index 40ecde96..ce900298 100644
--- a/plume-models/Cargo.toml
+++ b/plume-models/Cargo.toml
@@ -55,6 +55,7 @@ path = "../plume-common"
 path = "../plume-macro"
 
 [dev-dependencies]
+assert-json-diff = "2.0.1"
 diesel_migrations = "1.3.0"
 
 [features]