diff --git a/.buildozer b/.buildozer
new file mode 120000
index 0000000000000000000000000000000000000000..50ad1b4c8846dd0c4ab7ec34444fd35bfbab2448
--- /dev/null
+++ b/.buildozer
@@ -0,0 +1 @@
+/home/cse/.buildozer_share
\ No newline at end of file
diff --git a/.gitignore b/.gitignore
index 992a27a3655d7bf345eb414cab412c0e3183ffb8..cd4671cc426262b4805a15c8dbc6ca97b9217b44 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,5 +2,4 @@
 *.pyo
 
 .idea
-.buildozer
 bin
diff --git a/buildozer.spec b/buildozer.spec
index 4b2cfe28e597f244aaa1905e6675e397b6bc072f..df1b89fec3599561af0a32c0b340431bff4720fb 100644
--- a/buildozer.spec
+++ b/buildozer.spec
@@ -36,7 +36,7 @@ version = 1.0
 
 # (list) Application requirements
 # comma separated e.g. requirements = sqlite3,kivy
-requirements = kivy
+requirements = python3,kivy
 
 # (str) Custom source folders for requirements
 # Sets custom source for any requirements with recipes
@@ -88,16 +88,16 @@ fullscreen = 0
 #android.permissions = INTERNET
 
 # (int) Android API to use
-#android.api = 19
+android.api = 21
 
 # (int) Minimum API required
-#android.minapi = 9
+android.minapi = 21
 
 # (int) Android SDK version to use
 #android.sdk = 20
 
 # (str) Android NDK version to use
-#android.ndk = 9c
+android.ndk = 17c
 
 # (bool) Use --private data storage (True) or --dir public storage (False)
 #android.private_storage = True
@@ -146,8 +146,11 @@ fullscreen = 0
 # bootstrap)
 #android.gradle_dependencies =
 
+# (list) Java classes to add as activities to the manifest.
+#android.add_activites = com.example.ExampleActivity
+
 # (str) python-for-android branch to use, defaults to stable
-#p4a.branch = stable
+p4a.branch = master
 
 # (str) OUYA Console category. Should be one of GAME or APP
 # If you leave this blank, OUYA support will not be enabled
@@ -159,6 +162,9 @@ fullscreen = 0
 # (str) XML file to include as an intent filters in <activity> tag
 #android.manifest.intent_filters =
 
+# (str) launchMode to set for the main activity
+#android.manifest.launch_mode = standard
+
 # (list) Android additional libraries to copy into libs/armeabi
 #android.add_libs_armeabi = libs/android/*.so
 #android.add_libs_armeabi_v7a = libs/android-v7/*.so
@@ -201,6 +207,9 @@ android.arch = armeabi-v7a
 # (str) Bootstrap to use for android builds
 # p4a.bootstrap = sdl2
 
+# (int) port number to specify an explicit --port= p4a argument (eg for bootstrap flask)
+#p4a.port =
+
 
 #
 # iOS specific
@@ -220,7 +229,7 @@ android.arch = armeabi-v7a
 [buildozer]
 
 # (int) Log level (0 = error only, 1 = info, 2 = debug (with command output))
-log_level = 2
+log_level = 1
 
 # (int) Display warning if buildozer is run as root (0 = False, 1 = True)
 warn_on_root = 1
diff --git a/main.py b/main.py
index 11b5e3159818f79c14b7e3032c450dd5e35c96c2..bfb5197f31801ec9ad823055a08d05eb123d0705 100644
--- a/main.py
+++ b/main.py
@@ -7,8 +7,8 @@ class OneTimeButton(Button):
     count = 0
     index = NumericProperty()
 
-    def __init__(self):
-        super().__init__()
+    def __init__(self, **kwargs):
+        super().__init__(**kwargs)
         self.index = OneTimeButton.count
         OneTimeButton.count += 1
 
@@ -20,8 +20,8 @@ class OneTimeButton(Button):
 class GuessingButton(Button):
     hidden_text = StringProperty('')
 
-    def __init__(self, hidden_text):
-        super().__init__()
+    def __init__(self, hidden_text, **kwargs):
+        super().__init__(**kwargs)
         self.hidden_text = hidden_text
 
     def on_press(self):
diff --git a/override.py b/override.py
index b07f9651f158c57612fbda7013a2e76fb617f279..783f2884334ea05b24b591a0c6cd6a745d689556 100644
--- a/override.py
+++ b/override.py
@@ -5,8 +5,7 @@ class Person(object):
 
 class Patient(Person):
     def __str__(self):
-        text = super().__str__()
-        return 'Patient, a specialization of {text}'.format(text=text)
+        return f'Patient, a specialization of {super().__str__()}'
 
 
 if __name__ == '__main__':