diff --git a/Cargo.lock b/Cargo.lock
index 983e167b5..558af6d6a 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -819,7 +819,7 @@ dependencies = [
  "byteorder 1.2.4 (registry+https://github.com/rust-lang/crates.io-index)",
  "lazy_static 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.3.22 (registry+https://github.com/rust-lang/crates.io-index)",
- "secp256k1zkp 0.7.1 (git+https://github.com/mimblewimble/rust-secp256k1-zkp?tag=grin_integration_22)",
+ "secp256k1zkp 0.7.1 (git+https://github.com/mimblewimble/rust-secp256k1-zkp?tag=grin_integration_23)",
  "serde 1.0.70 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.70 (registry+https://github.com/rust-lang/crates.io-index)",
  "slog 2.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1762,7 +1762,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 [[package]]
 name = "secp256k1zkp"
 version = "0.7.1"
-source = "git+https://github.com/mimblewimble/rust-secp256k1-zkp?tag=grin_integration_22#248f999f1c454188e62ef12ca3a4b2fefe35d7a4"
+source = "git+https://github.com/mimblewimble/rust-secp256k1-zkp?tag=grin_integration_23#6f599fcc17b98340d0c4c9d87cc48d51f29d3816"
 dependencies = [
  "arrayvec 0.3.25 (registry+https://github.com/rust-lang/crates.io-index)",
  "gcc 0.3.54 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2636,7 +2636,7 @@ dependencies = [
 "checksum schannel 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)" = "dc1fabf2a7b6483a141426e1afd09ad543520a77ac49bd03c286e7696ccfd77f"
 "checksum scoped-tls 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "332ffa32bf586782a3efaeb58f127980944bbc8c4d6913a86107ac2a5ab24b28"
 "checksum scopeguard 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "94258f53601af11e6a49f722422f6e3425c52b06245a5cf9bc09908b174f5e27"
-"checksum secp256k1zkp 0.7.1 (git+https://github.com/mimblewimble/rust-secp256k1-zkp?tag=grin_integration_22)" = "<none>"
+"checksum secp256k1zkp 0.7.1 (git+https://github.com/mimblewimble/rust-secp256k1-zkp?tag=grin_integration_23)" = "<none>"
 "checksum security-framework 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)" = "dfa44ee9c54ce5eecc9de7d5acbad112ee58755239381f687e564004ba4a2332"
 "checksum security-framework-sys 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)" = "5421621e836278a0b139268f36eee0dc7e389b784dc3f79d8f11aabadf41bead"
 "checksum semver 0.9.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1d7eb9ef2c18661902cc47e535f9bc51b78acd254da71d375c2f6720d9a40403"
diff --git a/core/tests/transaction.rs b/core/tests/transaction.rs
index a4c8c11c9..5a908e217 100644
--- a/core/tests/transaction.rs
+++ b/core/tests/transaction.rs
@@ -20,7 +20,7 @@ extern crate grin_wallet as wallet;
 
 pub mod common;
 
-use grin_core::core::{Output, OutputFeatures};
+use grin_core::core::{Output, OutputFeatures, Transaction};
 use grin_core::ser;
 use keychain::{ExtKeychain, Keychain};
 use wallet::libtx::proof;
diff --git a/util/Cargo.toml b/util/Cargo.toml
index 5573f45f1..c7d095a04 100644
--- a/util/Cargo.toml
+++ b/util/Cargo.toml
@@ -20,6 +20,6 @@ zip = "0.4"
 
 [dependencies.secp256k1zkp]
 git = "https://github.com/mimblewimble/rust-secp256k1-zkp"
-tag = "grin_integration_22"
+tag = "grin_integration_23"
 #path = "../../rust-secp256k1-zkp"
 features = ["bullet-proof-sizing"]