diff --git a/src/pcd.rs b/src/pcd.rs
index 804a82b..0120a4b 100644
--- a/src/pcd.rs
+++ b/src/pcd.rs
@@ -24,6 +24,9 @@ use crate::{
     serialization::hex_array_btree
 };
 
+pub const PCD_VERSION: u8 = 1;
+pub(crate) const ZSTD_COMPRESSION_LEVEL: i32 = zstd::DEFAULT_COMPRESSION_LEVEL;
+
 #[derive(Debug, Default, Clone, Deserialize, Tsify)]
 #[tsify(into_wasm_abi, from_wasm_abi)]
 pub struct Member {