diff --git a/schala-lib/Cargo.toml b/schala-lib/Cargo.toml
index 23d8ead..0352761 100644
--- a/schala-lib/Cargo.toml
+++ b/schala-lib/Cargo.toml
@@ -15,9 +15,9 @@ colored = "1.5"
 serde = "1.0.15"
 serde_derive = "1.0.15"
 serde_json = "1.0.3"
-rocket = "*"
-rocket_codegen = "*"
-rocket_contrib = "*"
+rocket = "0.3.5"
+rocket_codegen = "0.3.5"
+rocket_contrib = "0.3.5"
 phf = "0.7.12"
 includedir = "0.2.0"