diff --git a/stmicro-stm32/build.zig b/stmicro-stm32/build.zig
index 26bbda7..471a727 100644
--- a/stmicro-stm32/build.zig
+++ b/stmicro-stm32/build.zig
@@ -2,7 +2,7 @@ const std = @import("std");
 const stm32 = @import("stm32");
 
 const available_examples = [_]Example{
-    // TODO: .{ .name = "stm32f103x8", .target = stm32.chips.stm32f103x8, .file = "src/blinky.zig" },
+    .{ .name = "stm32f103x8", .target = stm32.chips.stm32f103x8, .file = "src/blinky.zig" },
     // TODO: .{ .name = "stm32f303vc", .target = stm32.chips.stm32f303vc, .file = "src/blinky.zig" },
     // TODO: .{ .name = "stm32f407vg", .target = stm32.chips.stm32f407vg, .file = "src/blinky.zig" },
     // TODO: .{ .name = "stm32f429zit6u", .target = stm32.chips.stm32f429zit6u, .file = "src/blinky.zig" },
diff --git a/stmicro-stm32/build.zig.zon b/stmicro-stm32/build.zig.zon
index e54d44f..b6063ea 100644
--- a/stmicro-stm32/build.zig.zon
+++ b/stmicro-stm32/build.zig.zon
@@ -7,8 +7,8 @@
             .hash = "1220af58bdaa721b8189f3a7adfda660517dd354463463388e96d69fe4ceccf80b92",
         },
         .stm32 = .{
-            .url = "https://github.com/ZigEmbeddedGroup/stmicro-stm32/archive/cb2893707efa6aa289fa72f02959ad5f2d9db2a1.tar.gz",
-            .hash = "12208cab5f60ef97cac4165ad694f3ba0c7b28f279538c1539b74f7c152f34fe306d",
+            .url = "https://github.com/ZigEmbeddedGroup/stmicro-stm32/archive/237890d49ee795110a63df2c45bdd6f6a0029a72.tar.gz",
+            .hash = "1220960897777f9713fa1055ffdf1fbad1518b2f62bd2f2ae39b887821dbf0781df0",
         },
     },
 }
diff --git a/stmicro-stm32/src/blinky.zig b/stmicro-stm32/src/blinky.zig
new file mode 100644
index 0000000..1fad430
--- /dev/null
+++ b/stmicro-stm32/src/blinky.zig
@@ -0,0 +1,22 @@
+const std = @import("std");
+const microzig = @import("microzig");
+const stm32 = microzig.hal;
+
+const pin_config = stm32.pins.GlobalConfiguration{
+    .GPIOC = .{
+        .PIN13 = .{ .name = "led", .mode = .{ .output = .general_purpose_push_pull } },
+    },
+};
+
+pub fn main() !void {
+    const pins = pin_config.apply();
+
+    while (true) {
+        var i: u32 = 0;
+        while (i < 800_000) {
+            asm volatile ("nop");
+            i += 1;
+        }
+        pins.led.toggle();
+    }
+}