diff --git a/README.rst b/README.rst
index c0b86bea..604b9141 100644
--- a/README.rst
+++ b/README.rst
@@ -17,7 +17,7 @@ A stateless javascript client interface is provided by a different project,
 Quickstart
 ==========
 
-Here's how you can get started from scratch with sane defaults with python>=3.6:
+Here's how you can get started from scratch with sane defaults with python>=3.5:
 
 .. code-block:: bash
 
diff --git a/ara/clients/utils.py b/ara/clients/utils.py
index aa4f1d89..da95cc11 100644
--- a/ara/clients/utils.py
+++ b/ara/clients/utils.py
@@ -42,7 +42,7 @@ def get_client(
 
         return AraHttpClient(endpoint=endpoint, timeout=timeout, auth=auth)
     else:
-        raise ValueError(f"Unsupported API client: {client} (use 'http' or 'offline')")
+        raise ValueError("Unsupported API client: %s (use 'http' or 'offline')" % client)
 
 
 def active_client():
diff --git a/ara/server/__main__.py b/ara/server/__main__.py
index fa8ec999..2fd6ac12 100644
--- a/ara/server/__main__.py
+++ b/ara/server/__main__.py
@@ -33,7 +33,7 @@ def main():
         raise MissingDjangoException from e
 
     execute_from_command_line(sys.argv)
-    print(f"[ara] Using settings file: {settings.ARA_SETTINGS}")
+    print("[ara] Using settings file: %s" % settings.ARA_SETTINGS)
 
 
 if __name__ == "__main__":
diff --git a/ara/server/settings.py b/ara/server/settings.py
index b5e92577..e24f45f6 100644
--- a/ara/server/settings.py
+++ b/ara/server/settings.py
@@ -238,7 +238,7 @@ ARA_SETTINGS = os.getenv("ARA_SETTINGS", DEFAULT_SETTINGS)
 
 # Ensure default base configuration/data directory exists
 if not os.path.isdir(BASE_DIR):
-    print(f"[ara] Creating data & configuration directory: {BASE_DIR}")
+    print("[ara] Creating data & configuration directory: %s" % BASE_DIR)
     os.makedirs(BASE_DIR, mode=0o700)
 
 if not os.path.exists(DEFAULT_SETTINGS) and "ARA_SETTINGS" not in os.environ:
@@ -268,13 +268,18 @@ if not os.path.exists(DEFAULT_SETTINGS) and "ARA_SETTINGS" not in os.environ:
         TIME_ZONE=TIME_ZONE,
     )
     with open(DEFAULT_SETTINGS, "w+") as settings_file:
-        comment = f"""---
-        # This is a default settings template generated by ARA.
-        # To use a settings file such as this one, you need to export the
-        # ARA_SETTINGS environment variable like so:
-        #   $ export ARA_SETTINGS="{DEFAULT_SETTINGS}"
+        comment = textwrap.dedent(
+            """
+            ---
+            # This is a default settings template generated by ARA.
+            # To use a settings file such as this one, you need to export the
+            # ARA_SETTINGS environment variable like so:
+            #   $ export ARA_SETTINGS="{}"
 
-        """
-        print(f"[ara] Writing default settings to {DEFAULT_SETTINGS}")
-        settings_file.write(textwrap.dedent(comment))
+            """.format(
+                DEFAULT_SETTINGS
+            )
+        )
+        print("[ara] Writing default settings to %s" % DEFAULT_SETTINGS)
+        settings_file.write(comment.lstrip())
         yaml.dump({"default": SETTINGS}, settings_file, default_flow_style=False)
diff --git a/doc/source/installation.rst b/doc/source/installation.rst
index a1144177..881b8fcb 100644
--- a/doc/source/installation.rst
+++ b/doc/source/installation.rst
@@ -18,7 +18,7 @@ the project's `README <https://github.com/ansible-community/ara-web>`_.
 Requirements and dependencies
 -----------------------------
 
-ARA should work on any Linux distribution as long as python3.6 and greater is
+ARA should work on any Linux distribution as long as python3.5 and greater is
 available.
 
 In order to record data, ARA provides Ansible plugins that must be installed
diff --git a/roles/ara_api/tasks/pre-requirements.yaml b/roles/ara_api/tasks/pre-requirements.yaml
index 632fe8c7..5460b1ea 100644
--- a/roles/ara_api/tasks/pre-requirements.yaml
+++ b/roles/ara_api/tasks/pre-requirements.yaml
@@ -18,16 +18,16 @@
 
 # The ansible_python_version fact might end up retrieving the version of
 # python2 so we need to explicitely get the version of python 3 available.
-- name: Validate availability of Python 3.6
+- name: Validate availability of Python 3.5
   command: /usr/bin/python3 -c 'import sys; print(".".join(map(str, sys.version_info[:2])))'
   changed_when: false
   failed_when: false
   register: python_version
 
-- name: Fail pre-emptively if running Python <3.6
+- name: Fail pre-emptively if running Python <3.5
   fail:
-    msg: "Python >=3.6 is required to run ARA"
-  when: python_version.stdout is version('3.6', '<') or python_version.rc != 0
+    msg: "Python >=3.5 is required to run ARA"
+  when: python_version.stdout is version('3.5', '<') or python_version.rc != 0
 
 - name: Get list of installed packages
   package_facts:
diff --git a/setup.cfg b/setup.cfg
index 74f46850..0220b4dd 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -16,7 +16,9 @@ classifier =
     Operating System :: POSIX :: Linux
     Programming Language :: Python
     Programming Language :: Python :: 3
+    Programming Language :: Python :: 3.5
     Programming Language :: Python :: 3.6
+    Programming Language :: Python :: 3.7
     Development Status :: 4 - Beta
 
 [global]