diff --git a/.travis.yml b/.travis.yml
index c12794a..2d35087 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,6 @@
 language: python
 python:
-  - "2.7"
+  - "3.5"
 install:
   - pip install -r ./config/requirements.txt
 script:
diff --git a/Dockerfile b/Dockerfile
index f191b8d..a3af770 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:2
+FROM python:3.5
 
 WORKDIR /usr/src/app
 
diff --git a/config/requirements.txt b/config/requirements.txt
index 32da6ce..6ea2610 100644
--- a/config/requirements.txt
+++ b/config/requirements.txt
@@ -4,4 +4,4 @@ PyJWT==1.6.1
 psycopg2-binary==2.7.5
 uri==2.0.0
 urllib3==1.24.2
-web.py==0.39
+web.py==0.40-dev1
diff --git a/src/api.py b/src/api.py
index 248c42f..a7d08a6 100644
--- a/src/api.py
+++ b/src/api.py
@@ -139,7 +139,7 @@ def build_parms(filters):
             raise Error(BADFILTERS, msg="Unknown filter '%s'" % (p))
 
     process = {"work_type": types, "uri_scheme": schemes, "canonical": canoncl}
-    for key, values in process.items():
+    for key, values in list(process.items()):
         if len(values) > 0:
             try:
                 andclause, ops = build_clause(key, values)
diff --git a/src/aux.py b/src/aux.py
index 028c2cf..e988602 100644
--- a/src/aux.py
+++ b/src/aux.py
@@ -17,7 +17,7 @@ def logger_instance(name):
 
 
 def strtolist(data):
-    if isinstance(data, basestring) or isinstance(data, dict):
+    if isinstance(data, str) or isinstance(data, dict):
         return [data]
-    elif type(data) is list:
+    elif isinstance(data, list):
         return data
diff --git a/src/errors.py b/src/errors.py
index 41b17d6..1fbfd40 100644
--- a/src/errors.py
+++ b/src/errors.py
@@ -65,7 +65,10 @@ def __init__(self, level=DEFAULT, msg='', data=[]):
         httpcode   = self.get_code(level)
         headers    = {'Content-Type': 'application/json'}
         message    = self.get_message(level)
-        params     = web.input() if web.input() else web.data()
+        if web.ctx.env.get('REQUEST_METHOD', '') == 'GET':
+            params = web.input()
+        else:
+            params = web.data().decode('utf-8')
         output     = json.dumps(
             self.make_output(httpcode, message, msg, params, data))
 
diff --git a/src/models.py b/src/models.py
index 38a6537..80aaf8d 100644
--- a/src/models.py
+++ b/src/models.py
@@ -1,11 +1,13 @@
+import web
 import uuid
 import psycopg2
-from aux import logger_instance
+from aux import logger_instance, debug_mode
 from api import db
 from uri import URI
 from errors import Error, FATAL
 
 logger = logger_instance(__name__)
+web.config.debug = debug_mode()
 
 
 class Work(object):
@@ -421,10 +423,8 @@ def results_to_works(results, include_relatives=False):
     titles   = []  # temporary array of work titles
     uris     = []  # temp array of work URIs (strings, used for comparison)
     uris_fmt = []  # temporary array of work URIs (Identifier objects)
-    last     = len(results) - 1
 
-    i = 0
-    for e in results:
+    for i, e in enumerate(results):
         if i == 0:
             # we can't do cur=results[0] outsise--it moves IterBetter's pointer
             cur = e
@@ -449,14 +449,17 @@ def results_to_works(results, include_relatives=False):
             uris_fmt.append({"uri_scheme": e["uri_scheme"],
                              "uri_value": e["uri_value"],
                              "canonical": e["canonical"]})
-        if i == last:
-            cur["titles"] = titles
-            cur["URI"] = uris_fmt
-            work = result_to_work(cur)
-            work.URI = results_to_identifiers(cur["URI"])
-            if include_relatives:
-                work.load_children()
-                work.load_parents()
-            data.append(work.__dict__)
-        i += 1
+    try:
+        cur["titles"] = titles
+        cur["URI"] = uris_fmt
+        work = result_to_work(cur)
+        work.URI = results_to_identifiers(cur["URI"])
+        if include_relatives:
+            work.load_children()
+            work.load_parents()
+        data.append(work.__dict__)
+    except NameError:
+        # we need to run the above with the last element of IterBetter, if it
+        # fails it means that no results were iterated
+        pass
     return data
diff --git a/src/relationsctrl.py b/src/relationsctrl.py
index 444c02f..ca35727 100644
--- a/src/relationsctrl.py
+++ b/src/relationsctrl.py
@@ -22,9 +22,9 @@ def GET(self, name):
     @check_token
     def POST(self, name):
         """Create a work relation"""
-        logger.debug("Data: %s" % (web.data()))
+        logger.debug("Data: %s" % (web.data().decode('utf-8')))
 
-        data        = json.loads(web.data())
+        data        = json.loads(web.data().decode('utf-8'))
         parent_uuid = data.get('parent_UUID') or data.get('parent_uuid')
         child_uuid  = data.get('child_UUID') or data.get('child_uuid')
 
diff --git a/src/titlesctrl.py b/src/titlesctrl.py
index 8b077ef..3d93680 100644
--- a/src/titlesctrl.py
+++ b/src/titlesctrl.py
@@ -24,9 +24,9 @@ def GET(self, name):
     @check_token
     def POST(self, name):
         """Add titles to an existing work"""
-        logger.debug("Data: %s" % (web.data()))
+        logger.debug("Data: %s" % (web.data().decode('utf-8')))
 
-        data    = json.loads(web.data())
+        data    = json.loads(web.data().decode('utf-8'))
         title   = data.get('title')
         work_id = data.get('UUID') or data.get('uuid')
 
diff --git a/src/translator.py b/src/translator.py
index 1f9d69a..7eea732 100644
--- a/src/translator.py
+++ b/src/translator.py
@@ -1,5 +1,7 @@
 import web
-import urllib
+import urllib.parse
+import urllib.error
+import urllib.request
 from aux import logger_instance, debug_mode
 from api import build_parms, json_response, api_response, check_token
 from errors import Error, BADPARAMS, NORESULT, NOTALLOWED, \
@@ -41,7 +43,7 @@ def GET(self, name):
                 scheme, value = Identifier.split_uri(uri)
                 assert scheme and value
             if title:
-                title = urllib.unquote(title.strip())
+                title = urllib.parse.unquote(title.strip())
                 assert title
             assert uri or title
         except BaseException:
@@ -60,7 +62,7 @@ def GET(self, name):
         if not results:
             raise Error(NORESULT)
 
-        return self.process_results(results, strict)
+        return self.process_results(list(results), strict)
 
     def POST(self, name):
         raise Error(NOTALLOWED)
diff --git a/src/urisctrl.py b/src/urisctrl.py
index 829d6a3..853bc47 100644
--- a/src/urisctrl.py
+++ b/src/urisctrl.py
@@ -22,9 +22,9 @@ def GET(self, name):
     @check_token
     def POST(self, name):
         """Add identifiers to an existing work"""
-        logger.debug("Data: %s" % (web.data()))
+        logger.debug("Data: %s" % (web.data().decode('utf-8')))
 
-        data      = json.loads(web.data())
+        data      = json.loads(web.data().decode('utf-8'))
         uri       = data.get('URI') or data.get('uri')
         canonical = data.get('canonical') in (True, "true", "True")
         work_id   = data.get('UUID') or data.get('uuid')
diff --git a/src/worksctrl.py b/src/worksctrl.py
index c6cb8ce..d4e0124 100644
--- a/src/worksctrl.py
+++ b/src/worksctrl.py
@@ -57,9 +57,9 @@ def GET(self, name):
     @check_token
     def POST(self, name):
         """Create a work"""
-        logger.debug("Data: %s" % (web.data()))
+        logger.debug("Data: %s" % (web.data().decode('utf-8')))
 
-        data   = json.loads(web.data())
+        data   = json.loads(web.data().decode('utf-8'))
         wtype  = data.get('type')
         title  = data.get('title')
         uri    = data.get('URI') or data.get('uri')
@@ -78,7 +78,7 @@ def POST(self, name):
         try:
             assert WorkType(wtype).exists()
         except AssertionError:
-            t = wtype if type(wtype) == str else ""
+            t = wtype if isinstance(wtype, str) else ""
             raise Error(BADPARAMS, msg="Unknown work type '%s'" % (t))
 
         for i in uris: