diff --git a/src/lib.rs b/src/lib.rs
index a6548e1..0f5b33c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -135,8 +135,12 @@ pub enum Key {
     Space,
     Tab,
     CapsLock,
+    LeftShift,
+    RightShift,
+    LeftCtrl,
+    RightCtrl,
 
-    Count = 80,
+    Count = 84,
 }
 
 #[cfg(target_os = "windows")]
diff --git a/src/windows.rs b/src/windows.rs
index 52fa9ef..5340c33 100644
--- a/src/windows.rs
+++ b/src/windows.rs
@@ -106,6 +106,10 @@ fn update_key_state(window: &mut Window, wparam: u32, state: bool) {
         0x039 => window.keys[Key::Space as usize] = state,
         0x00F => window.keys[Key::Tab as usize] = state,
         0x03A => window.keys[Key::CapsLock as usize] = state,
+        0x02A => window.keys[Key::LeftShift as usize] = state,
+        0x036 => window.keys[Key::RightShift as usize] = state,
+        0x01D => window.keys[Key::LeftCtrl as usize] = state,
+        0x11D => window.keys[Key::RightCtrl as usize] = state,
         _ => (),
     }
 }