fix pymysql at 0.6.3 (GH9608)

jreback · jreback · commit 9a47ceb6b05f · 2015-03-09T16:52:27.000-04:00
diff --git a/ci/requirements-3.4.txt b/ci/requirements-3.4.txt
@@ -15,5 +15,5 @@ matplotlib
 lxml
 sqlalchemy
 bottleneck
-pymysql
+pymysql==0.6.3
 psycopg2
