diff --git a/mockredis/client.py b/mockredis/client.py
index 69d0b67..e37e5d8 100644
--- a/mockredis/client.py
+++ b/mockredis/client.py
@@ -1309,7 +1309,11 @@ def _range_func(self, withscores, score_cast_func):
         Return a suitable function from (score, member)
         """
         if withscores:
-            return lambda score_member: (score_member[1], score_cast_func(str(score_member[0])))
+            if score_cast_func == float:
+                # don't cast to string first or it will truncate the float, see #58
+                return lambda score_member: (score_member[1], score_cast_func(score_member[0]))
+            else:
+                return lambda score_member: (score_member[1], score_cast_func(str(score_member[0])))
         else:
             return lambda score_member: score_member[1]
 
diff --git a/mockredis/tests/test_zset.py b/mockredis/tests/test_zset.py
index cb5f7c4..16a422a 100644
--- a/mockredis/tests/test_zset.py
+++ b/mockredis/tests/test_zset.py
@@ -147,6 +147,13 @@ def test_zscore_int_member(self):
         self.redis.zadd(key, 1, 1.0)
         eq_(1.0, self.redis.zscore(key, 1))
 
+    def test_zscore_float_member(self):
+        key = "zset"
+        eq_(None, self.redis.zscore(key, 1))
+
+        self.redis.zadd(key, 1, 1.2345678901234)
+        eq_(1.2345678901234, self.redis.zscore(key, 1))
+
     def test_zrank(self):
         key = "zset"
         eq_(None, self.redis.zrank(key, "two"))
@@ -313,6 +320,14 @@ def test_zremrangebyscore(self):
         eq_([], self.redis.zrange(key, 0, -1))
         eq_([], self.redis.keys("*"))
 
+    def test_zrange_float_scores(self):
+        """
+        Make sure zrange doesn't truncate our floats, see #58
+        """
+        key = "zset"
+        self.redis.zadd(key, "long", 1.2345678901234)
+        eq_([("long", 1.2345678901234)], self.redis.zrange(key, 0, -1, withscores=True))
+
     def test_zunionstore_no_keys(self):
         key = "zset"
 
diff --git a/setup.py b/setup.py
index 966383f..35947c6 100755
--- a/setup.py
+++ b/setup.py
@@ -3,7 +3,7 @@
 from setuptools import setup, find_packages
 
 # Match releases to redis-py versions
-__version__ = '2.9.0.7'
+__version__ = '2.9.0.8'
 
 # Jenkins will replace __build__ with a unique value.
 __build__ = ''