diff --git a/dice.py b/dice.py
index caa8abc..1d63192 100755
--- a/dice.py
+++ b/dice.py
@@ -30,14 +30,14 @@ class Dice():
         reroll = 0
         reroll_times = 0
 
-        for m in re.findall(r'[dD+-]\d+', desc):
+        for m in re.findall(r'[lh+-]\d+', desc):
             if m[0] == '-':
                 mod += int(m)
             elif m[0] == '+':
                 mod += int(m[1:])
-            elif m[0] == 'D':
+            elif m[0] == 'h':
                 drop_high = int(m[1:])
-            elif m[0] == 'd':
+            elif m[0] == 'l':
                 drop_low = int(m[1:])
 
         m = re.search(r'r(\d+)(x\d+)?', desc)
@@ -170,8 +170,8 @@ This will roll X Y-sided dice and apply the specified modifiers.
 Modifiers can be any of the following (where N and M are integers):
 
 (+|-)N   Add or subtract N from the total
-dN       Drop the lowest-rolling N dice from the total
-DN       Drop the highest-rolling N dice from the total
+lN       Drop the lowest-rolling N dice from the total
+hN       Drop the highest-rolling N dice from the total
 rN[xM]   Any dice that roll <= N will be rerolled.
          If the optional 'xM' option is specified, dice will be rerolled a maximum of M times.
          Otherwise each die will be rerolled until the result is > N