diff --git a/contrib/lib/Cargo.toml b/contrib/lib/Cargo.toml
index 26106fac..70bda010 100644
--- a/contrib/lib/Cargo.toml
+++ b/contrib/lib/Cargo.toml
@@ -30,7 +30,7 @@ uuid = { version = ">= 0.5, <= 0.6", optional = true }
 
 # Serialization and templating dependencies.
 serde = { version = "1.0", optional = true }
-serde_json = { version = "1.0", optional = true }
+serde_json = { version = "1.0.26", optional = true }
 rmp-serde = { version = "^0.13", optional = true }
 
 # Templating dependencies only.