diff --git a/eleventy.config.js b/eleventy.config.js
index 6e3fa9a..b8431ae 100644
--- a/eleventy.config.js
+++ b/eleventy.config.js
@@ -1124,6 +1124,7 @@ export default function (eleventyConfig) {
     try {
       execFileSync(process.execPath, [
         "--max-old-space-size=768",
+        "--expose-gc",
         resolve(__dirname, "lib", "og-cli.js"),
         contentDir,
         cacheDir,
diff --git a/lib/og.js b/lib/og.js
index b13df90..4feb24b 100644
--- a/lib/og.js
+++ b/lib/og.js
@@ -298,6 +298,8 @@ export async function generateOgImages(contentDir, cacheDir, siteName) {
   let skipped = 0;
   const newManifest = {};
   const SAVE_INTERVAL = 10;
+  const GC_INTERVAL = 50;
+  const hasGC = typeof global.gc === "function";
 
   for (const filePath of mdFiles) {
     const raw = readFileSync(filePath, "utf8");
@@ -335,10 +337,21 @@ export async function generateOgImages(contentDir, cacheDir, siteName) {
     if (generated % SAVE_INTERVAL === 0) {
       writeFileSync(manifestPath, JSON.stringify(newManifest, null, 2));
     }
+
+    // Force GC to reclaim Satori/Resvg WASM native memory.
+    // V8 doesn't track native heap (Satori Yoga WASM + Resvg Rust WASM),
+    // so without periodic GC the JS wrappers accumulate and native memory
+    // grows unbounded. With --expose-gc this keeps peak RSS under control.
+    if (hasGC && generated % GC_INTERVAL === 0) {
+      global.gc();
+    }
   }
 
+  if (hasGC) global.gc();
   writeFileSync(manifestPath, JSON.stringify(newManifest, null, 2));
+  const mem = process.memoryUsage();
   console.log(
-    `[og] Generated ${generated} images, skipped ${skipped} (cached or have photos)`,
+    `[og] Generated ${generated} images, skipped ${skipped} (cached or have photos)` +
+    ` | RSS: ${(mem.rss / 1024 / 1024).toFixed(0)} MB, heap: ${(mem.heapUsed / 1024 / 1024).toFixed(0)} MB`,
   );
 }