diff --git a/.travis.yml b/.travis.yml
index 7c5be4b8ba5e3a6bb8421d614e73276bec427081..643573af3c4b41bc0500b9305360636a90bb7876 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -17,6 +17,14 @@ jobs:
       python: "3.8"
       script:
         - pytest --cov=./ --cov-report=xml
+    - stage: test
+      python: "pypy3.5"
+      script:
+        - pytest --cov=./ --cov-report=xml
+    - stage: test
+      python: "3.5"
+      script:
+        - pytest --cov=./ --cov-report=xml
     - stage: test
       python: "3.6"
       script:
diff --git a/setup.cfg b/setup.cfg
index 146c590ac5523fb7d62d3446573415e02982e52d..82ceddddf3035eea14bedb91a744f2090d3b589a 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -17,11 +17,13 @@ project-urls =
 classifier =
     Development Status :: 4 - Beta
     Programming Language :: Python
+    Programming Language :: Python :: 3.5
     Programming Language :: Python :: 3.6
     Programming Language :: Python :: 3.7
     Programming Language :: Python :: 3.8
     Programming Language :: Python :: 3.9
     Programming Language :: Python :: Implementation :: CPython
+    Programming Language :: Python :: Implementation :: PyPy
     Operating System :: OS Independent
     License :: OSI Approved :: MIT License
     Topic :: Software Development :: Libraries
@@ -36,4 +38,4 @@ max-line-length = 100
 universal = 0
 
 [options]
-python_requires = !=2.7.*,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*
+python_requires = !=2.7.*,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*