diff --git a/Cargo.lock b/Cargo.lock
index 6d1de5f..48943a9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -937,7 +937,7 @@ dependencies = [
  "libc",
  "option-ext",
  "redox_users",
- "windows-sys 0.61.2",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -1046,7 +1046,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "39cab71617ae0d63f51a36d69f866391735b51691dbda63cf6f96d042b63efeb"
 dependencies = [
  "libc",
- "windows-sys 0.61.2",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -2032,7 +2032,7 @@ version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d463f34ca3c400fde3a054da0e0b8c6ffa21e4590922f3e18281bb5eeef4cbdc"
 dependencies = [
- "windows-sys 0.61.2",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -2252,18 +2252,6 @@ version = "0.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1d87ecb2933e8aeadb3e3a02b828fed80a7528047e68b4f424523a0981a3a084"
 
-[[package]]
-name = "nix"
-version = "0.29.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "71e2746dc3a24dd78b3cfcb7be93368c6de9963d30f43a6a73998a9cf4b17b46"
-dependencies = [
- "bitflags",
- "cfg-if",
- "cfg_aliases",
- "libc",
-]
-
 [[package]]
 name = "nix"
 version = "0.30.1"
@@ -2298,7 +2286,7 @@ version = "0.50.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7957b9740744892f114936ab4a57b3f487491bbeafaf8083688b16841a4240e5"
 dependencies = [
- "windows-sys 0.61.2",
+ "windows-sys 0.59.0",
 ]
 
 [[package]]
@@ -2754,7 +2742,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "343d3bd7056eda839b03204e68deff7d1b13aba7af2b2fd16890697274262ee7"
 dependencies = [
  "heck",
- "itertools 0.14.0",
+ "itertools 0.12.1",
  "log",
  "multimap",
  "petgraph",
@@ -2775,7 +2763,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "27c6023962132f4b30eb4c172c91ce92d933da334c59c23cddee82358ddafb0b"
 dependencies = [
  "anyhow",
- "itertools 0.14.0",
+ "itertools 0.12.1",
  "proc-macro2",
  "quote",
  "syn 2.0.114",
@@ -2885,7 +2873,7 @@ dependencies = [
  "once_cell",
  "socket2",
  "tracing",
- "windows-sys 0.60.2",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -3139,7 +3127,7 @@ dependencies = [
  "clap",
  "hex",
  "insta",
- "nix 0.30.1",
+ "nix",
  "owo-colors",
  "regex",
  "ripemd 0.1.3",
@@ -3293,7 +3281,7 @@ dependencies = [
  "errno",
  "libc",
  "linux-raw-sys",
- "windows-sys 0.61.2",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -3755,7 +3743,7 @@ dependencies = [
  "getrandom 0.3.4",
  "once_cell",
  "rustix",
- "windows-sys 0.61.2",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -5069,9 +5057,9 @@ dependencies = [
 
 [[package]]
 name = "zebra-chain"
-version = "3.1.0"
+version = "4.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6b4aa7e85afd7bdf159e8c9a973d32bfc410be42ce82c2396690ae1208933bb8"
+checksum = "3b41d733382b3ecbf892f816ab9c1e448c9ae868d2bbb9f12a55b80c4e21fee2"
 dependencies = [
  "bech32",
  "bitflags",
@@ -5130,9 +5118,9 @@ dependencies = [
 
 [[package]]
 name = "zebra-consensus"
-version = "3.1.1"
+version = "3.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "770efa97a22262ee80290b0ffa251cddb34d7c50351c4e5255ed80f644d035e0"
+checksum = "11221f1e778bda63ec3e412dc29322a5293e517a24710ec0bc65aea26f1e55c8"
 dependencies = [
  "bellman",
  "blake2b_simd",
@@ -5169,9 +5157,9 @@ dependencies = [
 
 [[package]]
 name = "zebra-network"
-version = "2.0.2"
+version = "3.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3edeb353c33962fb5f9012745ddb44d33ee90acb8c9410669bf54d72488b8cf"
+checksum = "d3a34b04cb134997950b1ad0138aef9a6320f7aec16cab082419652ae3fcac8e"
 dependencies = [
  "bitflags",
  "byteorder",
@@ -5206,9 +5194,9 @@ dependencies = [
 
 [[package]]
 name = "zebra-node-services"
-version = "2.1.1"
+version = "2.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "863ddd987ed6373872b20629a471c535ae2ba114a193415227635840ec570ccd"
+checksum = "30236040805a4ae868e0f3f810ee92db08925307e21ee7d1b6d480cb4b8b5efc"
 dependencies = [
  "color-eyre",
  "jsonrpsee-types",
@@ -5222,9 +5210,9 @@ dependencies = [
 
 [[package]]
 name = "zebra-rpc"
-version = "3.1.0"
+version = "4.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c81f52b33b83f5a7f9b0377981843242c2657027053a406f01b06862dddbf747"
+checksum = "8afcfc310a775b123a9f27e32e50b25f2b02b80051bce5e4be3ced786d83e808"
 dependencies = [
  "base64",
  "chrono",
@@ -5239,7 +5227,7 @@ dependencies = [
  "jsonrpsee",
  "jsonrpsee-proc-macros",
  "jsonrpsee-types",
- "nix 0.29.0",
+ "nix",
  "prost",
  "rand 0.8.5",
  "sapling-crypto",
@@ -5272,9 +5260,9 @@ dependencies = [
 
 [[package]]
 name = "zebra-script"
-version = "3.0.1"
+version = "3.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "11acd2a4f9077e3698bbc51a3f04c247381f7bf7f77aacc408e5760d3246993b"
+checksum = "e3a0327411bde3e0ecd8212ddecfc003d214d3be966229ae675258a402e4ca04"
 dependencies = [
  "libzcash_script",
  "thiserror 2.0.17",
@@ -5285,9 +5273,9 @@ dependencies = [
 
 [[package]]
 name = "zebra-state"
-version = "3.1.1"
+version = "3.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b47250eaaa047bebde853a54184ab00ab19f47ed451f35b7c1ae8fe17004d87a"
+checksum = "8a110993e61b6057f20cb4abef92abe811f7d8a8957ee40688a1c30f23e2009a"
 dependencies = [
  "bincode",
  "chrono",
@@ -5418,7 +5406,7 @@ dependencies = [
 [[package]]
 name = "zingo_common_components"
 version = "0.1.0"
-source = "git+https://github.com/zingolabs/zingo-common.git?branch=dev#bec229a0bcc47b1d1430649f316be79dcc51a956"
+source = "git+https://github.com/zingolabs/zingo-common.git?branch=dev#7de9f9e8a261f95a632df2c57d2c9cbe68fc0ae8"
 dependencies = [
  "zebra-chain",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 948e640..4ac8361 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,9 +8,9 @@ resolver = "2"
 zingo_test_vectors = { path = "zingo_test_vectors" }
 
 # zebra
-zebra-chain = "3.0"
+zebra-chain = "4.0"
 zebra-node-services = "2.0"
-zebra-rpc = "3.0"
+zebra-rpc = "4.0"
 
 # other
 http = "1.1.0"
diff --git a/regtest-launcher/src/main.rs b/regtest-launcher/src/main.rs
index 11b9611..3c8b48d 100644
--- a/regtest-launcher/src/main.rs
+++ b/regtest-launcher/src/main.rs
@@ -92,13 +92,16 @@ async fn main() {
     );
     let client = RpcRequestClient::new(SocketAddr::from_str(&rpc_addr.to_string()).unwrap());
 
-    let regtest_network = Network::Testnet(Arc::new(Parameters::new_regtest(RegtestParameters {
-        activation_heights: heights,
-        funding_streams: None,
-        lockbox_disbursements: None,
-        checkpoints: None,
-        extend_funding_stream_addresses_as_required: None,
-    })));
+    let regtest_network = Network::Testnet(Arc::new(
+        Parameters::new_regtest(RegtestParameters {
+            activation_heights: heights,
+            funding_streams: None,
+            lockbox_disbursements: None,
+            checkpoints: None,
+            extend_funding_stream_addresses_as_required: None,
+        })
+        .unwrap(),
+    ));
 
     let running = Arc::new(AtomicBool::new(true));
     let running_miner = running.clone();