diff --git a/.travis.yml b/.travis.yml
index 19851de..239708f 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,13 +1,18 @@
 language: python
 python:
-  - "2.6"
   - "2.7"
-  - "3.3"
   - "3.4"
   - "3.5"
-  - "3.5-dev" # 3.5 development branch
-  - "nightly" # currently points to 3.6-dev
-
+  - "3.6"
+  - "3.7"
+  - "3.7-dev"
+  - "3.8-dev"
+  
+os: linux
+arch:
+  - amd64
+  - arm64
+  
 install:
   - pip install coverage
   - pip install pypack
diff --git a/README.md b/README.md
index da1f0c2..6cca3fd 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 Library to parse and apply unified diffs.
 
-[![Build Status](https://img.shields.io/travis/techtonik/python-patch.svg)](https://travis-ci.org/techtonik/python-patch)
+[![Build Status](https://img.shields.io/travis/techtonik/python-patch/master)](https://travis-ci.org/techtonik/python-patch/branches) [![PyPI](https://img.shields.io/pypi/v/patch)](https://pypi.python.org/pypi/patch)
 
 ### Features
 
diff --git a/patch.py b/patch.py
index 4b82af0..4775d70 100755
--- a/patch.py
+++ b/patch.py
@@ -337,7 +337,7 @@ def lineno(self):
     hunkparsed = False # state after successfully parsed hunk
 
     # regexp to match start of hunk, used groups - 1,3,4,6
-    re_hunk_start = re.compile(b"^@@ -(\d+)(,(\d+))? \+(\d+)(,(\d+))? @@")
+    re_hunk_start = re.compile(br"^@@ -(\d+)(,(\d+))? \+(\d+)(,(\d+))? @@")
     
     self.errors = 0
     # temp buffers for header and filenames info
@@ -516,7 +516,7 @@ def lineno(self):
             filenames = False
             headscan = True
           else:
-            re_filename = b"^\+\+\+ ([^\t]+)"
+            re_filename = br"^\+\+\+ ([^\t]+)"
             match = re.match(re_filename, line)
             if not match:
               warning("skipping invalid patch - no target filename at line %d" % (lineno+1))
@@ -542,7 +542,7 @@ def lineno(self):
               continue
 
       if hunkhead:
-        match = re.match(b"^@@ -(\d+)(,(\d+))? \+(\d+)(,(\d+))? @@(.*)", line)
+        match = re.match(br"^@@ -(\d+)(,(\d+))? \+(\d+)(,(\d+))? @@(.*)", line)
         if not match:
           if not p.hunks:
             warning("skipping invalid patch with no hunks for file %s" % p.source)