diff --git a/build.zig.zon b/build.zig.zon
index 3bf82afe5..571550860 100644
--- a/build.zig.zon
+++ b/build.zig.zon
@@ -12,8 +12,8 @@
             .lazy = true,
         },
         .emsdk = .{
-            .url = "git+https://github.com/emscripten-core/emsdk#3.1.50",
-            .hash = "N-V-__8AALRTBQDo_pUJ8IQ-XiIyYwDKQVwnr7-7o5kvPDGE",
+            .url = "git+https://github.com/emscripten-core/emsdk#4.0.9",
+            .hash = "N-V-__8AAJl1DwBezhYo_VE6f53mPVm00R-Fk28NPW7P14EQ",
             .lazy = true,
         },
     },
@@ -23,6 +23,6 @@
         "build.zig.zon",
         "src",
         "examples",
-	"LICENSE",
+        "LICENSE",
     },
 }