diff --git a/Cargo.lock b/Cargo.lock
index e7cdd9d..6d3dcf8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -38,7 +38,7 @@ checksum = "3748f82c7d366a0b4950257d19db685d4958d2fa27c6d164a3f069fec42b748b"
 
 [[package]]
 name = "core_io"
-version = "0.1.888888888"
+version = "0.1.9999"
 source = "git+https://git.m-labs.hk/abdul124/rust-core_io?rev=cf9ff24#cf9ff24e37d713c54d9eac1bafa38979a307128e"
 dependencies = [
  "rustc_version",