diff --git a/Pipfile.lock b/Pipfile.lock
index 95981df..4f7c667 100644
--- a/Pipfile.lock
+++ b/Pipfile.lock
@@ -446,7 +446,7 @@
                 "sha256:a68ac5e15e76e7e5dd2b8f94007233e01effe3e50e8daddf69acfd81cb686baf",
                 "sha256:b5725a0bd4ba422ab0e66e89e030c806576753ea3ee08554382c14e685d117b5"
             ],
-            "markers": "python_version != '3.0.*' and python_version >= '2.6' and python_version < '4' and python_version != '3.3.*' and python_version != '3.2.*' and python_version != '3.1.*'",
+            "markers": "python_version != '3.3.*' and python_version != '3.1.*' and python_version != '3.2.*' and python_version < '4' and python_version >= '2.6' and python_version != '3.0.*'",
             "version": "==1.23"
         },
         "vine": {
@@ -470,7 +470,7 @@
                 "sha256:0312ad34fcad8fac3704d441f7b317e50af620823353ec657a53e981f92920c0",
                 "sha256:ec9ae8adaae229e4f8446952d204a3e4b5fdd2d099f9be3aaf556120135fb3ee"
             ],
-            "markers": "python_version >= '2.7' and python_version != '3.0.*' and python_version != '3.3.*' and python_version != '3.2.*' and python_version != '3.1.*'",
+            "markers": "python_version != '3.3.*' and python_version != '3.1.*' and python_version >= '2.7' and python_version != '3.2.*' and python_version != '3.0.*'",
             "version": "==1.2.1"
         },
         "attrs": {
@@ -551,7 +551,7 @@
                 "sha256:27390c35495b0b3eab4720f3e186fac57c520104b84d7016cdc5f70a409f3f0c",
                 "sha256:4d246c7621b877e284c5b0a2cdf0b62406560ff548453ea759aedd11dfca4004"
             ],
-            "markers": "python_version != '3.0.*' and python_version >= '2.6' and python_version != '3.3.*' and python_version != '3.2.*' and python_version != '3.1.*'",
+            "markers": "python_version != '3.3.*' and python_version != '3.1.*' and python_version != '3.2.*' and python_version >= '2.6' and python_version != '3.0.*'",
             "version": "==1.0.0"
         },
         "more-itertools": {
@@ -567,7 +567,7 @@
                 "sha256:6e3836e39f4d36ae72840833db137f7b7d35105079aee6ec4a62d9f80d594dd1",
                 "sha256:95eb8364a4708392bae89035f45341871286a333f749c3141c20573d2b3876e1"
             ],
-            "markers": "python_version >= '2.7' and python_version != '3.0.*' and python_version != '3.3.*' and python_version != '3.2.*' and python_version != '3.1.*'",
+            "markers": "python_version != '3.3.*' and python_version != '3.1.*' and python_version >= '2.7' and python_version != '3.2.*' and python_version != '3.0.*'",
             "version": "==0.7.1"
         },
         "port-for": {
@@ -589,7 +589,7 @@
                 "sha256:cea2557ee6a9faa2c100947637ded68414e12b851633c4ce26e0311b2a2ed539",
                 "sha256:d081707ef0081920533db30200a2d30d5c0ea9cf6afa7cf8881ae4516cc69c48"
             ],
-            "markers": "python_version != '3.0.*' and python_version >= '2.6' and python_version != '3.3.*' and python_version != '3.2.*' and python_version != '3.1.*'",
+            "markers": "python_version != '3.3.*' and python_version != '3.1.*' and python_version != '3.2.*' and python_version >= '2.6' and python_version != '3.0.*'",
             "version": "==5.4.7"
         },
         "py": {
@@ -597,7 +597,7 @@
                 "sha256:06a30435d058473046be836d3fc4f27167fd84c45b99704f2fb5509ef61f9af1",
                 "sha256:50402e9d1c9005d759426988a492e0edaadb7f4e68bcddfea586bc7432d009c6"
             ],
-            "markers": "python_version >= '2.7' and python_version != '3.0.*' and python_version != '3.3.*' and python_version != '3.2.*' and python_version != '3.1.*'",
+            "markers": "python_version != '3.3.*' and python_version != '3.1.*' and python_version >= '2.7' and python_version != '3.2.*' and python_version != '3.0.*'",
             "version": "==1.6.0"
         },
         "pytest": {
@@ -610,11 +610,11 @@
         },
         "pytest-cov": {
             "hashes": [
-                "sha256:03aa752cf11db41d281ea1d807d954c4eda35cfa1b21d6971966cc041bbf6e2d",
-                "sha256:890fe5565400902b0c78b5357004aab1c814115894f4f21370e2433256a3eeec"
+                "sha256:513c425e931a0344944f84ea47f3956be0e416d95acbd897a44970c8d926d5d7",
+                "sha256:e360f048b7dae3f2f2a9a4d067b2dd6b6a015d384d1577c994a43f3f7cbad762"
             ],
             "index": "pypi",
-            "version": "==2.5.1"
+            "version": "==2.6.0"
         },
         "pytest-redis": {
             "hashes": [
@@ -652,7 +652,7 @@
                 "sha256:a68ac5e15e76e7e5dd2b8f94007233e01effe3e50e8daddf69acfd81cb686baf",
                 "sha256:b5725a0bd4ba422ab0e66e89e030c806576753ea3ee08554382c14e685d117b5"
             ],
-            "markers": "python_version != '3.0.*' and python_version >= '2.6' and python_version < '4' and python_version != '3.3.*' and python_version != '3.2.*' and python_version != '3.1.*'",
+            "markers": "python_version != '3.3.*' and python_version != '3.1.*' and python_version != '3.2.*' and python_version < '4' and python_version >= '2.6' and python_version != '3.0.*'",
             "version": "==1.23"
         },
         "versioneer": {
diff --git a/requirements-dev.txt b/requirements-dev.txt
index cbbfb98..605841d 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,22 +1,22 @@
 -i https://pypi.python.org/simple/
-atomicwrites==1.2.1; python_version != '3.1.*'
+atomicwrites==1.2.1; python_version != '3.0.*'
 attrs==18.2.0
 certifi==2018.8.24
 chardet==3.0.4
 codecov==2.0.15
 coverage==4.5.1
 idna==2.7
-mirakuru==1.0.0; python_version != '3.1.*'
+mirakuru==1.0.0; python_version != '3.0.*'
 more-itertools==4.3.0
-pluggy==0.7.1; python_version != '3.1.*'
+pluggy==0.7.1; python_version != '3.0.*'
 port-for==0.4
-psutil==5.4.7; python_version != '3.1.*'
-py==1.6.0; python_version != '3.1.*'
-pytest-cov==2.5.1
+psutil==5.4.7; python_version != '3.0.*'
+py==1.6.0; python_version != '3.0.*'
+pytest-cov==2.6.0
 pytest-redis==1.3.2
 pytest==3.8.0
 redis==2.10.6
 requests==2.19.1
 six==1.11.0
-urllib3==1.23; python_version != '3.1.*'
+urllib3==1.23; python_version != '3.0.*'
 versioneer==0.18