diff --git a/keyboard.py b/keyboard.py
index 34a9da2..9a04d9d 100644
--- a/keyboard.py
+++ b/keyboard.py
@@ -22,7 +22,7 @@ import gtk
 import rsvg
 import os, glob, re
 import pango
-import simplejson
+import json
 
 # Tweaking variables.
 HAND_YOFFSET = -15
@@ -321,10 +321,10 @@ class KeyboardData:
                 pass
 
     def load_letter_map(self, filename):
-        self.letter_map = simplejson.loads(open(filename, 'r').read())
+        self.letter_map = json.loads(open(filename, 'r').read())
 
     def save_letter_map(self, filename):
-        text = simplejson.dumps(self.letter_map, ensure_ascii=False, sort_keys=True, indent=4)
+        text = json.dumps(self.letter_map, ensure_ascii=False, sort_keys=True, indent=4)
         f = open(filename, 'w')
         f.write(text)
         f.close()
diff --git a/lessonbuilder.py b/lessonbuilder.py
index fa942b7..396ac86 100755
--- a/lessonbuilder.py
+++ b/lessonbuilder.py
@@ -16,7 +16,7 @@
 # You should have received a copy of the GNU General Public License
 # along with Typing Turtle.  If not, see <http://www.gnu.org/licenses/>.
 
-import os, sys, random, simplejson, locale, re, optparse
+import os, sys, random, json, locale, re, optparse
 from gettext import gettext as _
 
 # For modifier constants.
@@ -561,7 +561,7 @@ def main():
             new_keys=options.keys, base_keys=options.base_keys, 
             words=words, bad_words=bad_words)
 
-    text = simplejson.dumps(lesson, ensure_ascii=False, sort_keys=True, indent=4)
+    text = json.dumps(lesson, ensure_ascii=False, sort_keys=True, indent=4)
 
     open(options.output, 'w').write(text)
 
diff --git a/lessonscreen.py b/lessonscreen.py
index 5b620cb..3177dd5 100644
--- a/lessonscreen.py
+++ b/lessonscreen.py
@@ -16,7 +16,7 @@
 # vi:sw=4 et 
 
 # Import standard Python modules.
-import logging, os, math, time, copy, json, locale, datetime, random, re
+import logging, os, math, time, copy, locale, datetime, random, re
 from gettext import gettext as _
 
 # Import PyGTK.
diff --git a/mainscreen.py b/mainscreen.py
index 56c105e..8af4f93 100644
--- a/mainscreen.py
+++ b/mainscreen.py
@@ -15,7 +15,7 @@
 # along with Typing Turtle.  If not, see <http://www.gnu.org/licenses/>.
 
 # Import standard Python modules.
-import logging, os, math, time, copy, simplejson, locale, datetime, random, re, glob
+import logging, os, math, time, copy, cjson, locale, datetime, random, re, glob
 from gettext import gettext as _
 
 # Import PyGTK.
@@ -126,7 +126,7 @@ class MainScreen(gtk.VBox):
         for f in glob.iglob(path + '/*.lesson'):
             fd = open(f, 'r')
             try:
-                lesson = simplejson.loads(fd.read())
+                lesson = cjson.decode(fd.read())
                 self.lessons.append(lesson)
             finally:
                 fd.close()
diff --git a/medalscreen.py b/medalscreen.py
index 42833bf..a1d881a 100644
--- a/medalscreen.py
+++ b/medalscreen.py
@@ -15,7 +15,7 @@
 # along with Typing Turtle.  If not, see <http://www.gnu.org/licenses/>.
 
 # Import standard Python modules.
-import logging, os, math, time, copy, json, locale, datetime, random, re
+import logging, os, math, time, copy, locale, datetime, random, re
 from gettext import gettext as _
 
 # Import PyGTK.
diff --git a/typingturtle.py b/typingturtle.py
index e9c2f9e..e09fc71 100755
--- a/typingturtle.py
+++ b/typingturtle.py
@@ -115,7 +115,7 @@ class TypingTurtle(sugar.activity.activity.Activity):
         try:
             text = fd.read()
             print "read %s" % text
-            self.data = json.read(text)
+            self.data = json.loads(text)
         finally:
             fd.close()
 
@@ -129,7 +129,7 @@ class TypingTurtle(sugar.activity.activity.Activity):
         
         fd = open(file_path, 'w')
         try:
-            text = json.write(self.data)
+            text = json.dumps(self.data)
             fd.write(text)
             print "wrote %s" % text
         finally: