diff --git a/README.md b/README.md
index fa3c62c..4814b15 100644
--- a/README.md
+++ b/README.md
@@ -16,5 +16,5 @@ To build and install the latest version:
 
 To create and use a new secret key:
 
-    $ dd if=/dev/random iflag=fullblock of=glorytun.key bs=32 count=1
+    $ dd if=/dev/urandom of=glorytun.key bs=32 count=1
     # glorytun keyfile glorytun.key [...]