diff --git a/third_party/proto/confio/README.md b/third_party/proto/confio/README.md
new file mode 100644
index 0000000000..c57da2e224
--- /dev/null
+++ b/third_party/proto/confio/README.md
@@ -0,0 +1 @@
+This project can be found at: https://github.com/confio/ics23
diff --git a/third_party/proto/confio/proofs.proto b/third_party/proto/confio/proofs.proto
index da43503ecb..12d9e2da69 100644
--- a/third_party/proto/confio/proofs.proto
+++ b/third_party/proto/confio/proofs.proto
@@ -1,7 +1,6 @@
 syntax = "proto3";
 
 package ics23;
-option go_package = "github.com/confio/ics23/go";
 
 enum HashOp {
     // NO_HASH is the default if no data passed. Note this is an illegal argument some places.
@@ -11,6 +10,7 @@ enum HashOp {
     KECCAK = 3;
     RIPEMD160 = 4;
     BITCOIN = 5;  // ripemd160(sha256(x))
+    SHA512_256 = 6;
 }
 
 /**
diff --git a/third_party/proto/ibc/core/commitment/v1/commitment.proto b/third_party/proto/ibc/core/commitment/v1/commitment.proto
index b0afed2273..f0118b7165 100644
--- a/third_party/proto/ibc/core/commitment/v1/commitment.proto
+++ b/third_party/proto/ibc/core/commitment/v1/commitment.proto
@@ -5,7 +5,7 @@ package ibc.core.commitment.v1;
 option go_package = "github.com/cosmos/ibc-go/v3/modules/core/23-commitment/types";
 
 import "gogoproto/gogo.proto";
-import "proofs.proto";
+import "confio/proofs.proto";
 
 // MerkleRoot defines a merkle root hash.
 // In the Cosmos SDK, the AppHash of a block header becomes the root.
diff --git a/third_party/proto/ibc/lightclients/tendermint/v1/tendermint.proto b/third_party/proto/ibc/lightclients/tendermint/v1/tendermint.proto
index 2815fe6ad2..f04dc17565 100644
--- a/third_party/proto/ibc/lightclients/tendermint/v1/tendermint.proto
+++ b/third_party/proto/ibc/lightclients/tendermint/v1/tendermint.proto
@@ -6,7 +6,7 @@ option go_package = "github.com/cosmos/ibc-go/v3/modules/light-clients/07-tender
 
 import "tendermint/types/validator.proto";
 import "tendermint/types/types.proto";
-import "proofs.proto";
+import "confio/proofs.proto";
 import "google/protobuf/duration.proto";
 import "google/protobuf/timestamp.proto";
 import "ibc/core/client/v1/client.proto";