diff --git a/Cargo.toml b/Cargo.toml
index cae3c10..c3044d1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,6 +19,7 @@ include = [
 ]
 
 [dependencies]
+serde = "<=1.0.171"
 abortable_parser = "=0.2.3"
 clap         = "~2.33.0"
 serde_json   = "~1.0.9"