diff --git a/zip-proportional-output-fee-mechanism-pofm.rst b/zip-proportional-output-fee-mechanism-pofm.rst
index 7b3586e1..f43f9282 100644
--- a/zip-proportional-output-fee-mechanism-pofm.rst
+++ b/zip-proportional-output-fee-mechanism-pofm.rst
@@ -222,8 +222,8 @@ growth in transaction rates.
 Deployment
 ==========
 
-Wallets can deploy these changes immediately. Nodes can deploy the change
-to the *low\_fee\_penalty* threshold described in `Mempool size limiting`_
+Wallets SHOULD deploy these changes immediately. Nodes SHOULD deploy the
+change to the *low\_fee\_penalty* threshold described in `Mempool size limiting`_
 immediately.
 
 Nodes can deploy restrictions to their policies for relaying, mempool