diff --git a/Cargo.lock b/Cargo.lock
index ff33ab8ac..c942ff751 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -192,24 +192,6 @@ dependencies = [
  "iovec 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "bzip2"
-version = "0.3.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "bzip2-sys 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "bzip2-sys"
-version = "0.1.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cc 1.0.25 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.44 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "cc"
 version = "1.0.25"
@@ -2894,8 +2876,6 @@ name = "zip"
 version = "0.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bzip2 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "flate2 1.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "msdos_time 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "podio 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.40 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -2927,8 +2907,6 @@ dependencies = [
 "checksum byte-tools 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "560c32574a12a89ecd91f5e742165893f86e3ab98d21f8ea548658eb9eef5f40"
 "checksum byteorder 1.2.7 (registry+https://github.com/rust-lang/crates.io-index)" = "94f88df23a25417badc922ab0f5716cc1330e87f71ddd9203b3a3ccd9cedf75d"
 "checksum bytes 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)" = "40ade3d27603c2cb345eb0912aec461a6dec7e06a4ae48589904e808335c7afa"
-"checksum bzip2 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "42b7c3cbf0fa9c1b82308d57191728ca0256cb821220f4e2fd410a72ade26e3b"
-"checksum bzip2-sys 0.1.7 (registry+https://github.com/rust-lang/crates.io-index)" = "6584aa36f5ad4c9247f5323b0a42f37802b37a836f0ad87084d7a33961abe25f"
 "checksum cc 1.0.25 (registry+https://github.com/rust-lang/crates.io-index)" = "f159dfd43363c4d08055a07703eb7a3406b0dac4d0584d96965a3262db3c9d16"
 "checksum cexpr 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "42aac45e9567d97474a834efdee3081b3c942b2205be932092f53354ce503d6c"
 "checksum cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "082bb9b28e00d3c9d39cc03e64ce4cea0f1bb9b3fde493f0cbc008472d22bdf4"
diff --git a/util/Cargo.toml b/util/Cargo.toml
index cf2d22ad9..03a6b5851 100644
--- a/util/Cargo.toml
+++ b/util/Cargo.toml
@@ -20,7 +20,7 @@ serde_derive = "1"
 log4rs = { version = "0.8.1", features = ["rolling_file_appender", "compound_policy", "size_trigger", "fixed_window_roller"] }
 log = "0.4"
 walkdir = "2"
-zip = "0.4"
+zip = { version = "0.4", default-features = false }
 parking_lot = {version = "0.6"}
 
 [dependencies.grin_secp256k1zkp]