diff --git a/.circleci/config.yml b/.circleci/config.yml
index 260047d..9275b60 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -39,15 +39,9 @@ jobs:
   lint:
     <<: *common
     docker:
-      - image: circleci/python:3.6
+      - image: circleci/python:3.7
         environment:
           TOXENV: lint
-  py27-core:
-    <<: *common
-    docker:
-      - image: circleci/python:2.7
-        environment:
-          TOXENV: py27
   py34-core:
     <<: *common
     docker:
@@ -66,12 +60,18 @@ jobs:
       - image: circleci/python:3.6
         environment:
           TOXENV: py36-core
+  py37-core:
+    <<: *common
+    docker:
+      - image: circleci/python:3.7
+        environment:
+          TOXENV: py37-core
 workflows:
   version: 2
   test:
     jobs:
       - lint
-      - py27-core
       - py34-core
       - py35-core
       - py36-core
+      - py37-core
diff --git a/setup.py b/setup.py
index b77f094..836d81b 100644
--- a/setup.py
+++ b/setup.py
@@ -38,15 +38,14 @@
     package_data={'py_ecc': ['py.typed']},
     install_requires=[
     ],
-    python_requires='>=2.7, <4',
+    python_requires='>=3.4, <4',
     extras_require=extras_require,
     classifiers=[
         'Development Status :: 3 - Alpha',
         'Intended Audience :: Developers',
         'License :: OSI Approved :: MIT License',
         'Natural Language :: English',
-        'Programming Language :: Python :: 2.7',
-        'Programming Language :: Python :: 3',
+        '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 dd5e5fa..21f0f2b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 envlist=
-    py{27,34,35,36,37}-core
+    py{34,35,36,37}-core
     lint
 
 [flake8]
@@ -16,7 +16,6 @@ passenv=
 deps =
     -r{toxinidir}/requirements-dev.txt
 basepython =
-    py27: python2.7
     py34: python3.4
     py35: python3.5
     py36: python3.6