diff --git a/lib/flow/fund.ts b/lib/flow/fund.ts
index 944fe1c..88231f1 100644
--- a/lib/flow/fund.ts
+++ b/lib/flow/fund.ts
@@ -12,7 +12,7 @@ transaction(address: Address, amount: UFix64) {
 	let tokenAdmin: &FlowToken.Administrator
 	let tokenReceiver: &{FungibleToken.Receiver}
 
-	prepare(signer: AuthAccount) {
+	prepare(signer: auth(BorrowValue) &Account) {
 		self.tokenAdmin = signer.storage.borrow<&FlowToken.Administrator>(from: /storage/flowTokenAdmin)
 			?? panic("Signer is not the token admin")