diff --git a/.github/workflows/zig-build.yaml b/.github/workflows/zig-build.yaml
index f3876b3..3ead6ab 100644
--- a/.github/workflows/zig-build.yaml
+++ b/.github/workflows/zig-build.yaml
@@ -12,7 +12,7 @@ jobs:
       - uses: actions/checkout@v4
       - uses: elerch/setup-zig@v3
         with:
-          version: 0.12.0
+          version: 0.13.0
       - uses: elerch/zig-action-cache@v1.1.6
       - name: Build project
         run: zig build --summary all
diff --git a/build.zig b/build.zig
index 599b6bc..abad6b3 100644
--- a/build.zig
+++ b/build.zig
@@ -19,7 +19,7 @@ pub fn build(b: *std.Build) !void {
         .name = "lambda-zig-sample",
         // In this case the main source file is merely a path, however, in more
         // complicated build scripts, this could be a generated file.
-        .root_source_file = .{ .path = "src/main.zig" },
+        .root_source_file = b.path("src/main.zig"),
         .target = target,
         .optimize = optimize,
     });
@@ -57,7 +57,7 @@ pub fn build(b: *std.Build) !void {
     // Creates a step for unit testing. This only builds the test executable
     // but does not run it.
     const unit_tests = b.addTest(.{
-        .root_source_file = .{ .path = "src/main.zig" },
+        .root_source_file = b.path("src/main.zig"),
         .target = target,
         .optimize = optimize,
     });
diff --git a/build.zig.zon b/build.zig.zon
index 7e78364..4f83d60 100644
--- a/build.zig.zon
+++ b/build.zig.zon
@@ -3,8 +3,8 @@
     .version = "0.1.0",
     .dependencies = .{
         .@"lambda-zig" = .{
-            .url = "https://git.lerch.org/lobo/lambda-zig/archive/9d1108697282d24509472d7019c97d1afe06ba1c.tar.gz",
-            .hash = "12205b8a2be03b63a1b07bde373e8293c96be53a68a58054abe8689f80d691633862",
+            .url = "https://git.lerch.org/lobo/lambda-zig/archive/ef5b793882c60ff3d9f3e088fc47758e8ec5a2bc.tar.gz",
+            .hash = "122053d827cde4634ab521ee87cc1195abbbdbd9b5ccc66e557764a151f88c138d02",
         },
     },
     .paths = .{
@@ -12,5 +12,6 @@
         "build.zig.zon",
         "src",
         "README.md",
+        "LICENSE.md",
     },
 }