diff --git a/ProxyRegistry.sol b/ProxyRegistry.sol
index f6ed7af..c9fa8d0 100644
--- a/ProxyRegistry.sol
+++ b/ProxyRegistry.sol
@@ -82,7 +82,7 @@ contract DSNote {
 // useful to execute a sequence of atomic actions. Since the owner of
 // the proxy can be changed, this allows for dynamic ownership models
 // i.e. a multisig
-contract DSProxy is DSAuth {
+contract DSProxy is DSAuth, DSNote {
     DSProxyCache public cache;  // global cache for contracts
 
     constructor(address _cacheAddr) public {
diff --git a/UserProxy.sol b/UserProxy.sol
index 6272174..cc2384e 100644
--- a/UserProxy.sol
+++ b/UserProxy.sol
@@ -82,7 +82,7 @@ contract DSNote {
 // useful to execute a sequence of atomic actions. Since the owner of
 // the proxy can be changed, this allows for dynamic ownership models
 // i.e. a multisig
-contract DSProxy is DSAuth {
+contract DSProxy is DSAuth, DSNote {
     DSProxyCache public cache;  // global cache for contracts
 
     constructor(address _cacheAddr) public {