--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2037,16 +2037,17 @@ name = "webdriver"
 version = "0.34.0"
 dependencies = [
  "cookie 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "hyper 0.10.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "log 0.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "regex 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc-serialize 0.3.24 (registry+https://github.com/rust-lang/crates.io-index)",
  "time 0.1.38 (registry+https://github.com/rust-lang/crates.io-index)",
+ "unicode-segmentation 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "webrender"
 version = "0.57.0"
 dependencies = [
  "app_units 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",

--- a/testing/webdriver/Cargo.toml
+++ b/testing/webdriver/Cargo.toml
@@ -12,8 +12,9 @@ license = "MPL-2.0"
 [dependencies]
 cookie = { version = "0.10", default-features = false }
 hyper = "0.10"
 log = "0.4"
 regex = "0.2"
 rustc-serialize = "0.3"
 time = "0.1"
 url = "1"
+unicode-segmentation = "1.1.0"
\ No newline at end of file

--- a/testing/webdriver/src/actions.rs
+++ b/testing/webdriver/src/actions.rs
@@ -1,12 +1,13 @@
 use command::Parameters;
 use common::{Nullable, WebElement};
 use error::{WebDriverResult, WebDriverError, ErrorStatus};
 use rustc_serialize::json::{ToJson, Json};
+use unicode_segmentation::UnicodeSegmentation;
 use std::collections::BTreeMap;
 use std::default::Default;
 
 #[derive(Debug, PartialEq)]
 pub struct ActionSequence {
     pub id: Nullable<String>,
     pub actions: ActionsType
 }
@@ -363,36 +364,36 @@ impl ToJson for KeyAction {
     fn to_json(&self) -> Json {
         match self {
             &KeyAction::Down(ref x) => x.to_json(),
             &KeyAction::Up(ref x) => x.to_json(),
         }
     }
 }
 
-fn validate_key_value(value_str: &str) -> WebDriverResult<char> {
-    let mut chars = value_str.chars();
-    let value = if let Some(c) = chars.next() {
-        c
+fn validate_key_value(value_str: &str) -> WebDriverResult<String> {
+    let mut graphemes = value_str.graphemes(true);
+    let value = if let Some(g) = graphemes.next() {
+        g
     } else {
         return Err(WebDriverError::new(
             ErrorStatus::InvalidArgument,
             "Parameter 'value' was an empty string"))
     };
-    if chars.next().is_some() {
+    if graphemes.next().is_some() {
         return Err(WebDriverError::new(
             ErrorStatus::InvalidArgument,
-            "Parameter 'value' contained multiple characters"))
+            "Parameter 'value' contained multiple graphemes"))
     };
-    Ok(value)
+    Ok(value.to_string())
 }
 
 #[derive(Debug, PartialEq)]
 pub struct KeyUpAction {
-    pub value: char
+    pub value: String
 }
 
 impl Parameters for KeyUpAction {
     fn from_json(body: &Json) -> WebDriverResult<KeyUpAction> {
         let value_str = try_opt!(
                 try_opt!(body.find("value"),
                          ErrorStatus::InvalidArgument,
                          "Missing value parameter").as_string(),
@@ -414,17 +415,17 @@ impl ToJson for KeyUpAction {
         data.insert("value".to_string(),
                     self.value.to_string().to_json());
         Json::Object(data)
     }
 }
 
 #[derive(Debug, PartialEq)]
 pub struct KeyDownAction {
-    pub value: char
+    pub value: String
 }
 
 impl Parameters for KeyDownAction {
     fn from_json(body: &Json) -> WebDriverResult<KeyDownAction> {
         let value_str = try_opt!(
                 try_opt!(body.find("value"),
                          ErrorStatus::InvalidArgument,
                          "Missing value parameter").as_string(),

--- a/testing/webdriver/src/lib.rs
+++ b/testing/webdriver/src/lib.rs
@@ -3,16 +3,17 @@
 #[macro_use]
 extern crate log;
 extern crate rustc_serialize;
 extern crate hyper;
 extern crate regex;
 extern crate cookie;
 extern crate time;
 extern crate url;
+extern crate unicode_segmentation;
 
 #[macro_use] pub mod macros;
 pub mod actions;
 pub mod httpapi;
 pub mod capabilities;
 pub mod command;
 pub mod common;
 pub mod error;