diff --git a/Cargo.lock b/Cargo.lock
index 2711905..e7cdd9d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -38,8 +38,8 @@ checksum = "3748f82c7d366a0b4950257d19db685d4958d2fa27c6d164a3f069fec42b748b"
 
 [[package]]
 name = "core_io"
-version = "0.1.20210325"
-source = "git+https://git.m-labs.hk/abdul124/rust-core_io?rev=8005787#80057878c9116fec8aede2e4a121b1182c239eb6"
+version = "0.1.888888888"
+source = "git+https://git.m-labs.hk/abdul124/rust-core_io?rev=cf9ff24#cf9ff24e37d713c54d9eac1bafa38979a307128e"
 dependencies = [
  "rustc_version",
 ]
diff --git a/flake.lock b/flake.lock
index 96fa2fa..11a70d7 100644
--- a/flake.lock
+++ b/flake.lock
@@ -18,11 +18,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1720386169,
-        "narHash": "sha256-NGKVY4PjzwAa4upkGtAMz1npHGoRzWotlSnVlqI40mo=",
+        "lastModified": 1721226092,
+        "narHash": "sha256-UBvzVpo5sXSi2S/Av+t+Q+C2mhMIw/LBEZR+d6NMjws=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "194846768975b7ad2c4988bdb82572c00222c0d7",
+        "rev": "c716603a63aca44f39bef1986c13402167450e0a",
         "type": "github"
       },
       "original": {
diff --git a/flake.nix b/flake.nix
index 21a252e..1022bb5 100644
--- a/flake.nix
+++ b/flake.nix
@@ -117,7 +117,7 @@
         cargoLock = { 
           lockFile = ./Cargo.lock;
           outputHashes = {
-              "core_io-0.1.20210325" = "sha256-2ZdKk+cgsh/WKPlWpCq9A/m+gHxN19Eqix/Om1IwaGM=";
+              "core_io-0.1.888888888" = "sha256-PtKamRQ9RlWeB2f/r5bska3iCoYisJvoPrG9iNvO0ac=";
             };
         };
 
diff --git a/libconfig/Cargo.toml b/libconfig/Cargo.toml
index 8b454fe..91c4923 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 = "8005787", features = ["collections"] }
+core_io = { git = "https://git.m-labs.hk/abdul124/rust-core_io.git", rev = "cf9ff24", 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 2df6f4c..75bc82e 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 = "8005787", features = ["collections"] }
+core_io = { git = "https://git.m-labs.hk/abdul124/rust-core_io.git", rev = "cf9ff24", features = ["collections"] }
 
 libboard_zynq = { path = "../libboard_zynq" }
 libsupport_zynq = { path = "../libsupport_zynq" }