diff --git a/_tasks/dnt.ts b/_tasks/dnt.ts
index 4dd95ec14..bde432998 100755
--- a/_tasks/dnt.ts
+++ b/_tasks/dnt.ts
@@ -36,6 +36,9 @@ await Promise.all([
     }, {
       name: "./patterns/identity",
       path: "./patterns/identity.ts",
+    }, {
+      name: "./patterns/size_tree",
+      path: "./patterns/sizeTree.ts",
     }, {
       name: "./server",
       path: "./server/mod.ts",