diff --git a/protob/messages-ripple.proto b/protob/messages-ripple.proto
new file mode 100644
index 000000000..ef233556f
--- /dev/null
+++ b/protob/messages-ripple.proto
@@ -0,0 +1,55 @@
+syntax = "proto2";
+
+// Sugar for easier handling in Java
+option java_package = "com.satoshilabs.trezor.lib.protobuf";
+option java_outer_classname = "TrezorMessageRipple";
+
+/**
+ * Request: Address at the specified index
+ * @next RippleAddress
+ */
+message RippleGetAddress {
+	repeated uint32 address_n = 1;			// BIP-32 path. For compatibility with other wallets, must be m/44'/144'/index'
+	optional bool show_display = 2;			// optionally show on display before sending the result
+}
+
+/**
+ * Response: Address for the given index
+ * @prev RippleGetAddress
+ */
+message RippleAddress {
+	optional string address = 1;	// Address in Ripple format (base58 of a pubkey with checksum)
+}
+
+/**
+ * Request: ask device to sign Ripple transaction
+ * @next RippleSignedTx
+ */
+message RippleSignTx {
+	repeated uint32 address_n = 1;				// BIP-32 path. For compatibility with other wallets, must be m/44'/144'/index'
+	optional uint32 fee = 2;					// fee (in drops) for the transaction
+	optional uint32 flags = 3;					// transaction flags
+	optional uint32 sequence = 4;				// transaction sequence number
+	optional uint32 last_ledger_sequence = 5;	// see https://developers.ripple.com/reliable-transaction-submission.html#lastledgersequence
+	optional RipplePayment payment = 6;			// Payment transaction type
+
+	/**
+	 * Payment transaction type
+	 * - simple A sends money to B
+	 * - only a subset of fields is supported
+	 * - see https://developers.ripple.com/payment.html 
+	 */
+	message RipplePayment {
+		optional uint32 amount = 1;				// only XRP is supported at the moment so this an integer
+		optional string destination = 2;		// destination account address
+	}
+}
+
+/**
+ * Response: signature for transaction
+ * @prev RippleSignTx
+ */
+message RippleSignedTx {
+	optional bytes signature = 1;
+	optional bytes serialized_tx = 2;
+}
diff --git a/protob/messages.proto b/protob/messages.proto
index 8f15182c3..069c55925 100644
--- a/protob/messages.proto
+++ b/protob/messages.proto
@@ -172,4 +172,12 @@ enum MessageType {
     MessageType_CardanoAddress = 308 [(wire_out) = true];
     MessageType_CardanoTxAck = 309 [(wire_in) = true];
     MessageType_CardanoSignedTransaction = 310 [(wire_out) = true];
+
+    // Ripple
+    MessageType_RippleGetAddress = 400 [(wire_in) = true];
+    MessageType_RippleAddress = 401 [(wire_out) = true];
+    MessageType_RippleSignTx = 402 [(wire_in) = true];
+    MessageType_RippleTxTypeRequest = 403 [(wire_in) = true];
+    MessageType_RipplePaymentTxType = 404 [(wire_in) = true];
+    MessageType_RippleSignedTx = 405 [(wire_in) = true];
 }