diff --git a/.circleci/config.yml b/.circleci/config.yml
index 749274c..72dad71 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -34,7 +34,7 @@ jobs:
 
   test: &test-defaults
     docker:
-      - image: circleci/python:2.7
+      - image: circleci/python:3.7
 
     steps:
       - checkout
@@ -59,16 +59,6 @@ jobs:
       - codecov/upload:
           file: coverage.xml
 
-  test-py27:
-    <<: *test-defaults
-    docker:
-      - image: circleci/python:2.7
-
-  test-py34:
-    <<: *test-defaults
-    docker:
-      - image: circleci/python:3.4
-
   test-py35:
     <<: *test-defaults
     docker:
@@ -86,7 +76,7 @@ jobs:
 
   deploy:
     docker:
-      - image: circleci/python:3.6
+      - image: circleci/python:3.7
 
     steps:
       - checkout
@@ -139,14 +129,6 @@ workflows:
           filters:
             tags:
               only: /^v.*/
-      - test-py27:
-          filters:
-            tags:
-              only: /^v.*/
-      - test-py34:
-          filters:
-            tags:
-              only: /^v.*/
       - test-py35:
           filters:
             tags:
@@ -162,8 +144,6 @@ workflows:
       - deploy:
           requires:
             - lint
-            - test-py27
-            - test-py34
             - test-py35
             - test-py36
             - test-py37
diff --git a/bors.toml b/bors.toml
index da91359..d4c6766 100644
--- a/bors.toml
+++ b/bors.toml
@@ -1,7 +1,5 @@
 status = [
   "ci/circleci: lint",
-  "ci/circleci: test-py27",
-  "ci/circleci: test-py34",
   "ci/circleci: test-py35",
   "ci/circleci: test-py36",
   "ci/circleci: test-py37",
diff --git a/requirements-dev.txt b/requirements-dev.txt
index dfdd14d..015e327 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,3 +1,3 @@
 -r requirements.txt
-pytest==4.6.3
+pytest==5.0.1
 pytest-cov==2.7.1
diff --git a/setup.py b/setup.py
index 28867de..e7c42e7 100644
--- a/setup.py
+++ b/setup.py
@@ -56,8 +56,6 @@ def run(self):
         "Operating System :: MacOS",
         "Operating System :: Unix",
         "Programming Language :: Python",
-        "Programming Language :: Python :: 2.7",
-        "Programming Language :: Python :: 3.4",
         "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
diff --git a/tox.ini b/tox.ini
index 0bf4c32..b474730 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py27, py34, py35, py36, py37
+envlist = py35, py36, py37
 
 [testenv]
 commands = py.test tests -vv