diff --git a/examples/memory/go.mod b/examples/memory/go.mod
new file mode 100644
index 0000000..8c007fb
--- /dev/null
+++ b/examples/memory/go.mod
@@ -0,0 +1,5 @@
+module github.com/felixge/go-profiler-notes/examples/memory
+
+go 1.15
+
+require golang.org/x/sync v0.0.0-20201207232520-09787c993a3a
diff --git a/examples/memory/go.sum b/examples/memory/go.sum
new file mode 100644
index 0000000..5f7eb37
--- /dev/null
+++ b/examples/memory/go.sum
@@ -0,0 +1,2 @@
+golang.org/x/sync v0.0.0-20201207232520-09787c993a3a h1:DcqTD9SDLc+1P/r1EmRBwnVsrOwW+kk2vWf9n+1sGhs=
+golang.org/x/sync v0.0.0-20201207232520-09787c993a3a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
diff --git a/examples/heap.go b/examples/memory/main.go
similarity index 98%
rename from examples/heap.go
rename to examples/memory/main.go
index 74ca7b1..dd8e386 100644
--- a/examples/heap.go
+++ b/examples/memory/main.go
@@ -1,5 +1,3 @@
-// +build ignore
-
 package main
 
 import (