diff --git a/Cargo.toml b/Cargo.toml
index f43f9eb..e0d028c 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -30,23 +30,26 @@ required-features = ["bin"]
 [features]
 bin = ["measure_time", "pretty_env_logger"]
 
+[profile.release]
+lto = true
+
 [dependencies]
-ironsea_index = "^0.1"
-ironsea_index_sfc_dbc = "^0.1"
-ironsea_index_hashmap = "^0.1"
+ironsea_index = "0.1"
+ironsea_index_sfc_dbc = "0.1"
+ironsea_index_hashmap = "0.1"
 
-arrayref = "^0.3" # For Positions Objects
-lazy_static = "^1.3"
-memmap = "^0.7"
+arrayref = "0.3" # For Positions Objects
+lazy_static = "1.4"
+memmap = "0.7"
 
-serde = { version = "^1.0", features = ["derive"] }
-serde_json = "^1.0"
-bincode = "^1.1"
+serde = { version = "1.0", features = ["derive"] }
+serde_json = "1.0"
+bincode = "1.3.0"
 
 # Logging macros API
-#log = { version = "^0.4", features = ["max_level_trace", "release_max_level_info"] }
-log = { version = "^0.4", features = ["max_level_trace", "release_max_level_trace"] }
+#log = { version = "0.4", features = ["max_level_trace", "release_max_level_info"] }
+log = { version = "0.4", features = ["max_level_trace", "release_max_level_trace"] }
 
 # Used for main.rs as integration test
-pretty_env_logger = { version = "^0.3", optional = true }       # Logger implementation
-measure_time = { version = "^0.6", optional = true }  # To mesure parsing time, only required by binary
+pretty_env_logger = { version = "0.3", optional = true }       # Logger implementation
+measure_time = { version = "0.6", optional = true }  # To mesure parsing time, only required by binary