diff --git a/Cargo.toml b/Cargo.toml
index ac9dd7b..3d9383f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,12 +13,16 @@ exclude = [ "/res/*", "/tests/*", "/fuzz/*", "/benches/*" ]
 [features]
 default = ["std"]
 # Disable for no_std support
-std = ["parity-wasm/std"]
+std = [
+    "parity-wasm/std",
+    "wasmi-validation/std",
+]
 # Enable for no_std support
 # hashbrown only works on no_std
 core = ["hashbrown/nightly", "libm"]
 
 [dependencies]
+wasmi-validation = { path = "validation", default-features = false }
 parity-wasm = { version = "0.31", default-features = false }
 hashbrown = { version = "0.1.8", optional = true }
 memory_units = "0.3.0"
diff --git a/src/lib.rs b/src/lib.rs
index badcfb9..93b7aa9 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -120,6 +120,8 @@ extern crate hashbrown;
 extern crate memory_units as memory_units_crate;
 extern crate parity_wasm;
 
+extern crate wasmi_validation as validation;
+
 #[allow(unused_imports)]
 use alloc::prelude::*;
 use core::fmt;
@@ -392,7 +394,6 @@ mod prepare;
 mod runner;
 mod table;
 mod types;
-mod validation;
 mod value;
 
 #[cfg(test)]
diff --git a/src/memory.rs b/src/memory.rs
index dad0b68..9f3302f 100644
--- a/src/memory.rs
+++ b/src/memory.rs
@@ -108,7 +108,7 @@ impl MemoryInstance {
     ///
     /// [`LINEAR_MEMORY_PAGE_SIZE`]: constant.LINEAR_MEMORY_PAGE_SIZE.html
     pub fn alloc(initial: Pages, maximum: Option<Pages>) -> Result<MemoryRef, Error> {
-        validate_memory(initial, maximum).map_err(Error::Memory)?;
+        validation::validate_memory(initial, maximum).map_err(Error::Memory)?;
 
         let memory = MemoryInstance::new(initial, maximum);
         Ok(MemoryRef(Rc::new(memory)))
@@ -268,7 +268,7 @@ impl MemoryInstance {
         }
 
         let new_size: Pages = size_before_grow + additional;
-        let maximum = self.maximum.unwrap_or(LINEAR_MEMORY_MAX_PAGES);
+        let maximum = self.maximum.unwrap_or(validation::LINEAR_MEMORY_MAX_PAGES);
         if new_size > maximum {
             return Err(Error::Memory(format!(
                 "Trying to grow memory by {} pages when already have {}",
diff --git a/src/module.rs b/src/module.rs
index 8222e42..10ed6b7 100644
--- a/src/module.rs
+++ b/src/module.rs
@@ -10,7 +10,7 @@ use hashbrown::HashMap;
 #[cfg(feature = "std")]
 use std::collections::HashMap;
 
-use common::{DEFAULT_MEMORY_INDEX, DEFAULT_TABLE_INDEX};
+use validation::{DEFAULT_MEMORY_INDEX, DEFAULT_TABLE_INDEX};
 use core::cell::Ref;
 use func::{FuncBody, FuncInstance, FuncRef};
 use global::{GlobalInstance, GlobalRef};
diff --git a/src/prepare/compile.rs b/src/prepare/compile.rs
index e332314..7bf412a 100644
--- a/src/prepare/compile.rs
+++ b/src/prepare/compile.rs
@@ -6,8 +6,8 @@ use validation::func::{
 };
 use validation::util::Locals;
 use validation::{Error, FunctionValidator};
+use validation::stack::StackWithLimit;
 
-use common::stack::StackWithLimit;
 use isa;
 
 /// Type of block frame.
diff --git a/src/runner.rs b/src/runner.rs
index ed7bfc7..1240619 100644
--- a/src/runner.rs
+++ b/src/runner.rs
@@ -1,6 +1,6 @@
 #[allow(unused_imports)]
 use alloc::prelude::*;
-use common::{DEFAULT_MEMORY_INDEX, DEFAULT_TABLE_INDEX};
+use validation::{DEFAULT_MEMORY_INDEX, DEFAULT_TABLE_INDEX};
 use core::fmt;
 use core::ops;
 use core::{u32, usize};
diff --git a/validation/Cargo.toml b/validation/Cargo.toml
index 5028604..88baefe 100644
--- a/validation/Cargo.toml
+++ b/validation/Cargo.toml
@@ -6,7 +6,7 @@ edition = "2018"
 
 [dependencies]
 parity-wasm = { version = "0.31", default-features = false }
-memory_units = "0.3.0"
+memory_units_crate = { package = "memory_units", version = "0.3.0" }
 
 [features]
 default = ["std"]
diff --git a/validation/src/lib.rs b/validation/src/lib.rs
index 9abd9c1..cdce855 100644
--- a/validation/src/lib.rs
+++ b/validation/src/lib.rs
@@ -30,6 +30,12 @@ use hashbrown::HashSet;
 #[cfg(feature = "std")]
 use std::collections::HashSet;
 
+/// WebAssembly-specific sizes and units.
+pub mod memory_units {
+    pub use memory_units_crate::wasm32::*;
+    pub use memory_units_crate::{size_of, ByteSize, Bytes, RoundUpTo};
+}
+
 use memory_units::Pages;
 
 use self::context::ModuleContextBuilder;
@@ -437,7 +443,7 @@ fn validate_memory_type(memory_type: &MemoryType) -> Result<(), Error> {
 }
 
 /// Maximal number of pages that a wasm instance supports.
-const LINEAR_MEMORY_MAX_PAGES: Pages = Pages(65536);
+pub const LINEAR_MEMORY_MAX_PAGES: Pages = Pages(65536);
 
 pub fn validate_memory(initial: Pages, maximum: Option<Pages>) -> Result<(), String> {
     if initial > LINEAR_MEMORY_MAX_PAGES {