diff --git a/Project.toml b/Project.toml
index 189da80..4365b26 100644
--- a/Project.toml
+++ b/Project.toml
@@ -27,6 +27,7 @@ Cbc = "0.6"
 Clp = "0.8"
 DataFrames = "0.21"
 DataStructures = "0.17"
+GZip = "0.5"
 Geodesy = "0.5"
 JSON = "0.21"
 JSONSchema = "0.2"