diff --git a/Cargo.lock b/Cargo.lock
index 6d3dcf8..399144a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -38,8 +38,8 @@ checksum = "3748f82c7d366a0b4950257d19db685d4958d2fa27c6d164a3f069fec42b748b"
 
 [[package]]
 name = "core_io"
-version = "0.1.9999"
-source = "git+https://git.m-labs.hk/abdul124/rust-core_io?rev=cf9ff24#cf9ff24e37d713c54d9eac1bafa38979a307128e"
+version = "0.1.20210325"
+source = "git+https://git.m-labs.hk/abdul124/rust-core_io?rev=7cb9d46#7cb9d46e76399354d86125478bab3aa535463ce2"
 dependencies = [
  "rustc_version",
 ]
diff --git a/flake.nix b/flake.nix
index 0d022b5..a9ba1a5 100644
--- a/flake.nix
+++ b/flake.nix
@@ -117,7 +117,7 @@
         cargoLock = { 
           lockFile = ./Cargo.lock;
           outputHashes = {
-              "core_io-0.1.9999" = "sha256-PtKamRQ9RlWeB2f/r5bska3iCoYisJvoPrG9iNvO0ac=";
+              "core_io-0.1.20210325" = "sha256-/I0pwUgRAJHxxOCZ06SmtflzMGcnYuN2kq24EIkMMD8=";
             };
         };
 
diff --git a/libconfig/Cargo.toml b/libconfig/Cargo.toml
index 91c4923..a277d38 100644
--- a/libconfig/Cargo.toml
+++ b/libconfig/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2018"
 
 [dependencies]
 libboard_zynq = { path = "../libboard_zynq" }
-core_io = { git = "https://git.m-labs.hk/abdul124/rust-core_io.git", rev = "cf9ff24", features = ["collections"] }
+core_io = { git = "https://git.m-labs.hk/abdul124/rust-core_io.git", rev = "7cb9d46", features = ["collections"] }
 fatfs = { version = "0.3", features = ["core_io"], default-features = false }
 log = "0.4"
 
diff --git a/szl/Cargo.toml b/szl/Cargo.toml
index 75bc82e..0998f02 100644
--- a/szl/Cargo.toml
+++ b/szl/Cargo.toml
@@ -15,7 +15,7 @@ default = ["target_zc706"]
 [dependencies]
 log = "0.4"
 byteorder = { version = "1.3", default-features = false }
-core_io = { git = "https://git.m-labs.hk/abdul124/rust-core_io.git", rev = "cf9ff24", features = ["collections"] }
+core_io = { git = "https://git.m-labs.hk/abdul124/rust-core_io.git", rev = "7cb9d46", features = ["collections"] }
 
 libboard_zynq = { path = "../libboard_zynq" }
 libsupport_zynq = { path = "../libsupport_zynq" }