diff --git a/Cargo.toml b/Cargo.toml
index 378a2c5..0d541d7 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,3 +19,6 @@ travis-ci = { repository = "hellow554/logical-rs" }
 
 [dependencies]
 chrono = "0.4"
+
+[dev-dependencies]
+proptest = "0.6"
\ No newline at end of file
diff --git a/src/models/rtlib/memory/mod.rs b/src/models/rtlib/memory/mod.rs
new file mode 100644
index 0000000..e69de29
diff --git a/src/models/rtlib/mod.rs b/src/models/rtlib/mod.rs
new file mode 100644
index 0000000..e69de29