diff --git a/readchar/key.py b/readchar/key.py
index 256c794..8fb83da 100644
--- a/readchar/key.py
+++ b/readchar/key.py
@@ -8,13 +8,32 @@
 ESC = "\x1b"
 
 # CTRL
-CTRL_A = "\x01"
-CTRL_B = "\x02"
-CTRL_C = "\x03"
-CTRL_D = "\x04"
-CTRL_E = "\x05"
-CTRL_F = "\x06"
-CTRL_Z = "\x1a"
+CTRL_A = '\x01'
+CTRL_B = '\x02'
+CTRL_C = '\x03'
+CTRL_D = '\x04'
+CTRL_E = '\x05'
+CTRL_F = '\x06'
+CTRL_G = '\x07'
+CTRL_H = '\x08'
+CTRL_I = '\t'
+CTRL_J = '\n'
+CTRL_K = '\x0b'
+CTRL_L = '\x0c'
+CTRL_M = '\r'
+CTRL_N = '\x0e'
+CTRL_O = '\x0f'
+CTRL_P = '\x10'
+CTRL_Q = '\x11'
+CTRL_R = '\x12'
+CTRL_S = '\x13'
+CTRL_T = '\x14'
+CTRL_U = '\x15'
+CTRL_V = '\x16'
+CTRL_W = '\x17'
+CTRL_X = '\x18'
+CTRL_Y = '\x19'
+CTRL_Z = '\x1a'
 
 # ALT
 ALT_A = "\x1b\x61"