diff --git a/Cargo.toml b/Cargo.toml
index b77aa0e..0346577 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,7 @@
 [package]
 name = "pwasm-utils"
 version = "0.15.0"
+edition = "2018"
 authors = ["Nikolay Volf <nikvolf@gmail.com>", "Sergey Pepyakin <s.pepyakin@gmail.com>"]
 license = "MIT/Apache-2.0"
 readme = "README.md"
@@ -8,6 +9,41 @@ description = "Collection of command-line utilities and corresponding Rust api f
 keywords = ["wasm", "webassembly", "pwasm"]
 repository = "https://github.com/paritytech/wasm-utils"
 
+[[bin]]
+name = "wasm-prune"
+path = "cli/prune/main.rs"
+required-features = ["cli"]
+
+[[bin]]
+name = "wasm-ext"
+path = "cli/ext/main.rs"
+required-features = ["cli"]
+
+[[bin]]
+name = "wasm-gas"
+path = "cli/gas/main.rs"
+required-features = ["cli"]
+
+[[bin]]
+name = "wasm-build"
+path = "cli/build/main.rs"
+required-features = ["cli"]
+
+[[bin]]
+name = "wasm-stack-height"
+path = "cli/stack_height/main.rs"
+required-features = ["cli"]
+
+[[bin]]
+name = "wasm-pack"
+path = "cli/pack/main.rs"
+required-features = ["cli"]
+
+[[bin]]
+name = "wasm-check"
+path = "cli/check/main.rs"
+required-features = ["cli"]
+
 [dependencies]
 # If you add the feature "bulk", make sure you fixed all expects that say
 # "parity-wasm is compiled without bulk-memory operations"
@@ -15,6 +51,12 @@ parity-wasm = { version = "0.41.0", default-features = false }
 log = { version = "0.4", default-features = false }
 byteorder = { version = "1", default-features = false }
 
+# Dependencies only used by the binaries
+glob = { version = "0.2", optional = true }
+clap = { version = "2.24", optional = true }
+env_logger = { version = "0.5", optional = true }
+lazy_static = { version = "1.0", optional = true }
+
 [dev-dependencies]
 tempdir = "0.3"
 wabt = "0.10"
@@ -26,8 +68,9 @@ binaryen = "0.8"
 [features]
 default = ["std"]
 std = ["parity-wasm/std", "log/std", "byteorder/std"]
-
-[workspace]
-members = [
-  "./cli",
+cli = [
+  "glob",
+  "clap",
+  "env_logger",
+  "lazy_static",
 ]
diff --git a/cli/Cargo.toml b/cli/Cargo.toml
deleted file mode 100644
index 0aa1508..0000000
--- a/cli/Cargo.toml
+++ /dev/null
@@ -1,51 +0,0 @@
-[package]
-name = "pwasm-utils-cli"
-version = "0.15.0"
-authors = ["Nikolay Volf <nikvolf@gmail.com>", "Sergey Pepyakin <s.pepyakin@gmail.com>"]
-license = "MIT/Apache-2.0"
-readme = "README.md"
-description = "Collection of command-line utilities and corresponding Rust api for producing pwasm-compatible executables"
-keywords = ["wasm", "webassembly", "pwasm"]
-repository = "https://github.com/paritytech/wasm-utils"
-
-[lib]
-
-[[bin]]
-name = "wasm-prune"
-path = "prune/main.rs"
-
-[[bin]]
-name = "wasm-ext"
-path = "ext/main.rs"
-
-[[bin]]
-name = "wasm-gas"
-path = "gas/main.rs"
-
-[[bin]]
-name = "wasm-build"
-path = "build/main.rs"
-
-[[bin]]
-name = "wasm-stack-height"
-path = "stack_height/main.rs"
-
-[[bin]]
-name = "wasm-pack"
-path = "pack/main.rs"
-
-[[bin]]
-name = "wasm-check"
-path = "check/main.rs"
-
-[dependencies]
-parity-wasm = "0.41.0"
-pwasm-utils = { path = "..", version = "0.15" }
-glob = "0.2"
-clap = "2.24"
-log = "0.4"
-env_logger = "0.5"
-lazy_static = "1.0"
-
-[dev-dependencies]
-tempdir = "0.3"
diff --git a/cli/README.md b/cli/README.md
deleted file mode 100644
index 7604c69..0000000
--- a/cli/README.md
+++ /dev/null
@@ -1,11 +0,0 @@
-# pwasm-utils-cli
-
-Collection of WASM utilities used in Parity and WASM contract devepment
-
-## Install
-
-Easiest way to use is to install via `cargo install`:
-
-```
-cargo install pwasm-utils-cli
-```
diff --git a/cli/build/main.rs b/cli/build/main.rs
index a03229a..f374d15 100644
--- a/cli/build/main.rs
+++ b/cli/build/main.rs
@@ -5,7 +5,7 @@ extern crate clap;
 extern crate glob;
 extern crate pwasm_utils as utils;
 extern crate parity_wasm;
-extern crate pwasm_utils_cli as logger;
+use pwasm_utils::logger;
 
 mod source;
 
@@ -67,7 +67,7 @@ pub fn process_output(input: &source::SourceInput) -> Result<(), Error> {
 }
 
 fn do_main() -> Result<(), Error> {
-	logger::init_log();
+	logger::init();
 
 	let matches = App::new("wasm-build")
 		.version(crate_version!())
diff --git a/cli/check/main.rs b/cli/check/main.rs
index d3d7a3b..7c95c7b 100644
--- a/cli/check/main.rs
+++ b/cli/check/main.rs
@@ -1,6 +1,6 @@
 extern crate parity_wasm;
 extern crate pwasm_utils as utils;
-extern crate pwasm_utils_cli as logger;
+use pwasm_utils::logger;
 extern crate clap;
 
 use clap::{App, Arg};
@@ -40,7 +40,7 @@ const ALLOWED_IMPORTS: &[&str] = &[
 ];
 
 fn main() {
-	logger::init_log();
+	logger::init();
 
 	let matches = App::new("wasm-check")
 						.arg(Arg::with_name("input")
diff --git a/cli/ext/main.rs b/cli/ext/main.rs
index 02d8ba3..aabb13c 100644
--- a/cli/ext/main.rs
+++ b/cli/ext/main.rs
@@ -1,12 +1,12 @@
 extern crate parity_wasm;
 extern crate pwasm_utils as utils;
-extern crate pwasm_utils_cli as logger;
+use pwasm_utils::logger;
 
 use std::env;
 
 fn main() {
 
-	logger::init_log();
+	logger::init();
 
 	let args = env::args().collect::<Vec<_>>();
 	if args.len() != 3 {
diff --git a/cli/gas/main.rs b/cli/gas/main.rs
index 6eec5b6..6ec45ee 100644
--- a/cli/gas/main.rs
+++ b/cli/gas/main.rs
@@ -1,11 +1,11 @@
 extern crate parity_wasm;
 extern crate pwasm_utils as utils;
-extern crate pwasm_utils_cli as logger;
+use pwasm_utils::logger;
 
 use std::env;
 
 fn main() {
-	logger::init_log();
+	logger::init();
 
 	let args = env::args().collect::<Vec<_>>();
 	if args.len() != 3 {
diff --git a/cli/pack/main.rs b/cli/pack/main.rs
index 5f163e2..f96219b 100644
--- a/cli/pack/main.rs
+++ b/cli/pack/main.rs
@@ -1,12 +1,12 @@
 extern crate parity_wasm;
 extern crate pwasm_utils as utils;
-extern crate pwasm_utils_cli as logger;
+use pwasm_utils::logger;
 extern crate clap;
 
 use clap::{App, Arg};
 
 fn main() {
-	logger::init_log();
+	logger::init();
 
 	let target_runtime = utils::TargetRuntime::pwasm();
 
diff --git a/cli/prune/main.rs b/cli/prune/main.rs
index c23ba58..d4fcd41 100644
--- a/cli/prune/main.rs
+++ b/cli/prune/main.rs
@@ -1,12 +1,12 @@
 extern crate parity_wasm;
 extern crate pwasm_utils as utils;
-extern crate pwasm_utils_cli as logger;
+use pwasm_utils::logger;
 extern crate clap;
 
 use clap::{App, Arg};
 
 fn main() {
-	logger::init_log();
+	logger::init();
 
 	let target_runtime = utils::TargetRuntime::pwasm();
 
diff --git a/cli/stack_height/main.rs b/cli/stack_height/main.rs
index 774baee..1b6842a 100644
--- a/cli/stack_height/main.rs
+++ b/cli/stack_height/main.rs
@@ -1,12 +1,12 @@
 extern crate pwasm_utils as utils;
 extern crate parity_wasm;
-extern crate pwasm_utils_cli as logger;
+use pwasm_utils::logger;
 
 use std::env;
 use utils::stack_height;
 
 fn main() {
-	logger::init_log();
+	logger::init();
 
 	let args = env::args().collect::<Vec<_>>();
 	if args.len() != 3 {
diff --git a/src/build.rs b/src/build.rs
index e79b72d..5370563 100644
--- a/src/build.rs
+++ b/src/build.rs
@@ -1,4 +1,3 @@
-use std;
 use super::{
 	optimize,
 	pack_instance,
@@ -10,7 +9,6 @@ use super::{
 	OptimizerError,
 	TargetRuntime,
 };
-use parity_wasm;
 use parity_wasm::elements;
 
 #[derive(Debug)]
diff --git a/src/ext.rs b/src/ext.rs
index 5dc1489..11c5f18 100644
--- a/src/ext.rs
+++ b/src/ext.rs
@@ -3,9 +3,10 @@ use std::vec::Vec;
 use std::borrow::ToOwned;
 
 use parity_wasm::{elements, builder};
-use optimizer::{import_section, export_section};
 use byteorder::{LittleEndian, ByteOrder};
 
+use crate::optimizer::{import_section, export_section};
+
 type Insertion = (usize, u32, u32, String);
 
 pub fn update_call_index(instructions: &mut elements::Instructions, original_imports: usize, inserts: &[Insertion]) {
diff --git a/src/gas/mod.rs b/src/gas/mod.rs
index 779029c..860b1c3 100644
--- a/src/gas/mod.rs
+++ b/src/gas/mod.rs
@@ -12,7 +12,7 @@ use std::mem;
 use std::vec::Vec;
 
 use parity_wasm::{elements, builder};
-use rules::Rules;
+use crate::rules::Rules;
 
 pub fn update_call_index(instructions: &mut elements::Instructions, inserted_index: u32) {
 	use parity_wasm::elements::Instruction::*;
@@ -518,7 +518,7 @@ mod tests {
 	use parity_wasm::{serialize, builder, elements};
 	use parity_wasm::elements::Instruction::*;
 	use super::*;
-	use rules;
+	use crate::rules;
 
 	pub fn get_function_body(module: &elements::Module, index: usize)
 		-> Option<&[elements::Instruction]>
diff --git a/src/gas/validation.rs b/src/gas/validation.rs
index d0b1c22..604906c 100644
--- a/src/gas/validation.rs
+++ b/src/gas/validation.rs
@@ -9,8 +9,8 @@
 //! the worst case.
 
 use super::MeteredBlock;
-use rules::Set as RuleSet;
-use rules::Rules;
+use crate::rules::Set as RuleSet;
+use crate::rules::Rules;
 use parity_wasm::elements::{FuncBody, Instruction};
 
 use std::collections::HashMap;
diff --git a/src/lib.rs b/src/lib.rs
index feae73d..081d99f 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -25,6 +25,8 @@ mod ref_list;
 mod symbols;
 #[cfg(feature = "std")]
 mod export_globals;
+#[cfg(feature = "cli")]
+pub mod logger;
 
 pub mod stack_height;
 
diff --git a/cli/src/lib.rs b/src/logger.rs
similarity index 76%
rename from cli/src/lib.rs
rename to src/logger.rs
index eeaabb0..222ad50 100644
--- a/cli/src/lib.rs
+++ b/src/logger.rs
@@ -1,10 +1,7 @@
-#[macro_use] extern crate log;
-#[macro_use] extern crate lazy_static;
-extern crate env_logger;
-
 use std::env;
 use log::LevelFilter;
 use env_logger::Builder;
+use lazy_static::lazy_static;
 
 lazy_static! {
 	static ref LOG_DUMMY: bool = {
@@ -22,6 +19,6 @@ lazy_static! {
 }
 
 /// Intialize log with default settings
-pub fn init_log() {
+pub fn init() {
 	let _ = *LOG_DUMMY;
 }
diff --git a/src/optimizer.rs b/src/optimizer.rs
index 1497544..a123cd6 100644
--- a/src/optimizer.rs
+++ b/src/optimizer.rs
@@ -7,7 +7,7 @@ use std::mem;
 
 use parity_wasm::elements;
 
-use symbols::{Symbol, expand_symbols, push_code_symbols, resolve_function};
+use crate::symbols::{Symbol, expand_symbols, push_code_symbols, resolve_function};
 
 #[derive(Debug)]
 pub enum Error {