diff --git a/build.zig b/build.zig
index 24ada008f..72323f1dc 100644
--- a/build.zig
+++ b/build.zig
@@ -4,8 +4,8 @@ const builtin = @import("builtin");
 const zls_version = std.SemanticVersion{ .major = 0, .minor = 12, .patch = 0 };
 
 /// document the latest breaking change that caused a change to the string below:
-/// compiler: rework std.atomic
-const min_zig_string = "0.12.0-dev.1710+2bffd8101";
+/// Remove all usages of `std.mem.copy` and remove `std.mem.set` (#18143)
+const min_zig_string = "0.12.0-dev.1767+1e42a3de89";
 
 pub fn build(b: *std.build.Builder) !void {
     comptime {
diff --git a/build.zig.zon b/build.zig.zon
index 4f1bb52db..f24e1eb56 100644
--- a/build.zig.zon
+++ b/build.zig.zon
@@ -9,8 +9,8 @@
             .hash = "122002462f37b67a54fa1ab712d870d4637dae0d94437c0077b148e1fb75616c573d",
         },
         .diffz = .{
-            .url = "https://github.com/ziglibs/diffz/archive/86f5435f63961dcdba8b76e47b44e2381671fb09.tar.gz",
-            .hash = "122014b1776beda990cdc7bdbecc6960bdce9eb762d6dc7cc6664517f171becc17dd",
+            .url = "https://github.com/ziglibs/diffz/archive/77ccba4b4ab2d5a89b2e1fe6cfe4ce7bb7361efb.tar.gz",
+            .hash = "122020da93490cefb22ff4b6a2a814d7572ef042e38b17f841d7195b92d69ff3be93",
         },
     },
     .paths = .{""},
diff --git a/deps.nix b/deps.nix
index 720b54c09..3499ff3ef 100644
--- a/deps.nix
+++ b/deps.nix
@@ -11,10 +11,10 @@ linkFarm "zig-packages" [
     };
   }
   {
-    name = "122014b1776beda990cdc7bdbecc6960bdce9eb762d6dc7cc6664517f171becc17dd";
+    name = "122020da93490cefb22ff4b6a2a814d7572ef042e38b17f841d7195b92d69ff3be93";
     path = fetchzip {
-      url = "https://github.com/ziglibs/diffz/archive/86f5435f63961dcdba8b76e47b44e2381671fb09.tar.gz";
-      hash = "sha256-JXQQfyzDwSQ7+H8rWTdb0GrN5Rgeo3kCIYmW5QiWX9w=";
+      url = "https://github.com/ziglibs/diffz/archive/77ccba4b4ab2d5a89b2e1fe6cfe4ce7bb7361efb.tar.gz";
+      hash = "sha256-11y9tETADYRPAbpsO2iL7zeV4n8FOz3hkpnEsl/x0xA=";
     };
   }
 ]
diff --git a/flake.lock b/flake.lock
index 339b8c4b2..5a682b0f9 100644
--- a/flake.lock
+++ b/flake.lock
@@ -83,11 +83,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1700856099,
-        "narHash": "sha256-RnEA7iJ36Ay9jI0WwP+/y4zjEhmeN6Cjs9VOFBH7eVQ=",
+        "lastModified": 1701336116,
+        "narHash": "sha256-kEmpezCR/FpITc6yMbAh4WrOCiT2zg5pSjnKrq51h5Y=",
         "owner": "NixOS",
         "repo": "nixpkgs",
-        "rev": "0bd59c54ef06bc34eca01e37d689f5e46b3fe2f1",
+        "rev": "f5c27c6136db4d76c30e533c20517df6864c46ee",
         "type": "github"
       },
       "original": {
@@ -130,11 +130,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1701000474,
-        "narHash": "sha256-M/nfodghuNn9nhIYLiRWyddqIAVBHox32FimE1iUink=",
+        "lastModified": 1701390337,
+        "narHash": "sha256-C+Lyio+GPl3B2IAZ6Nk5hAAE2g6a8bO9vMACUfOLC/g=",
         "owner": "mitchellh",
         "repo": "zig-overlay",
-        "rev": "a8b011878747485fed674ef7d0b34bd59f164aff",
+        "rev": "1815ef2d0451b1121a6a91051da84906fcb06f99",
         "type": "github"
       },
       "original": {