diff --git a/docs/conf.py b/docs/conf.py
index d659b81..fdb1fcb 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -57,7 +57,7 @@ copyright = u'2014, sh'
 # The short X.Y version.
 version = '0.6'
 # The full version, including alpha/beta/rc tags.
-release = '0.6.4'
+release = '0.6.6'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/docs/tutorial/index.rst b/docs/tutorial/index.rst
index a77cdf5..22cd4a7 100644
--- a/docs/tutorial/index.rst
+++ b/docs/tutorial/index.rst
@@ -216,7 +216,7 @@ The following example python merge operator implements a counter ::
     # prints b'2'
     print db.get(b"a")
 
-We provide a set of default operators ``uintadd64`` and ``stringappend``::
+We provide a set of default operators ``rocksdb.merge_operators.UintAddOperator`` and ``rocksdb.merge_operators.StringAppendOperator``::
 
     from rocksdb.merge_operators import UintAddOperator, StringAppendOperator
     opts = rocksdb.Options()