diff --git a/cps/services/SyncToken.py b/cps/services/SyncToken.py
index c44841c1..bf31a7bc 100644
--- a/cps/services/SyncToken.py
+++ b/cps/services/SyncToken.py
@@ -19,10 +19,8 @@
 
 import sys
 from base64 import b64decode, b64encode
-from jsonschema import validate, exceptions, __version__
-from datetime import datetime, timezone
-
-from urllib.parse import unquote
+from jsonschema import validate, exceptions
+from datetime import datetime
 
 from flask import json
 from .. import logger
diff --git a/cps/static/js/kthoom.js b/cps/static/js/kthoom.js
index d955dfb1..072abcc0 100644
--- a/cps/static/js/kthoom.js
+++ b/cps/static/js/kthoom.js
@@ -177,12 +177,31 @@ kthoom.ImageFile = function(file) {
     }
 };
 
+function updateDirectionButtons(){
+    $("#right").show();
+    $("#left").show();
+    if (currentImage == 0 ) {
+        if (settings.direction === 0) {
+            $("#left").hide();
+        } else {
+            $("#right").hide();
+        }
+    }
+    if ((currentImage + 1) >= Math.max(totalImages, imageFiles.length)) {
+        if (settings.direction === 0) {
+            $("#right").hide();
+        } else {
+            $("#left").hide();
+        }
+    }
+}
 function initProgressClick() {
     $("#progress").click(function(e) {
         var offset = $(this).offset();
         var x = e.pageX - offset.left;
         var rate = settings.direction === 0 ? x / $(this).width() : 1 - x / $(this).width();
         currentImage = Math.max(1, Math.ceil(rate * totalImages)) - 1;
+        updateDirectionButtons();
         updatePage();
     });
 }
@@ -222,6 +241,11 @@ function loadFromArrayBuffer(ab) {
                                     
                                     // display first page if we haven't yet
                                     if (imageFiles.length === currentImage + 1) {
+                                        if (settings.direction === 0) {
+                                            $("#right").show();
+                                        } else {
+                                            $("#left").show();
+                                        }
                                         updatePage();
                                     }
                                 } else {
@@ -427,6 +451,7 @@ function showPrevPage() {
     } else {
         updatePage();
     }
+    updateDirectionButtons();
 }
 
 function showNextPage() {
@@ -437,6 +462,7 @@ function showNextPage() {
     } else {
         updatePage();
     }
+    updateDirectionButtons();
 }
 
 function scrollCurrentImageIntoView() {
@@ -677,6 +703,7 @@ function init(filename) {
         if(["hflip", "vflip", "rotateTimes"].includes(this.name)) {
             reloadImages();
         } else if(this.name === "direction") {
+            updateDirectionButtons();
             return updateProgress();
         }
         
@@ -726,7 +753,7 @@ function init(filename) {
         },
     });
     $(".mainImage").click(function(evt) {
-        // Firefox does not support offsetX/Y so we have to manually calculate
+        // Firefox does not support offsetX/Y, so we have to manually calculate
         // where the user clicked in the image.
         var mainContentWidth = $("#mainContent").width();
         var mainContentHeight = $("#mainContent").height();
diff --git a/cps/templates/readcbr.html b/cps/templates/readcbr.html
index a4ac3722..8b42cb79 100644
--- a/cps/templates/readcbr.html
+++ b/cps/templates/readcbr.html
@@ -77,8 +77,8 @@
   <div id="mainContent" tabindex="-1">
     <div id="mainText" style="display:none"></div>
   </div>
-  <div id="left" class="arrow" onclick="showLeftPage()">‹</div>
-  <div id="right" class="arrow" onclick="showRightPage()">›</div>
+  <div id="left" class="arrow" style="display:none" onclick="showLeftPage()">‹</div>
+  <div id="right" class="arrow" style="display:none" onclick="showRightPage()">›</div>
 </div>
 
 <div class="modal md-effect-1" id="settings-modal">
diff --git a/cps/tornado_wsgi.py b/cps/tornado_wsgi.py
index af93219c..9be3645d 100644
--- a/cps/tornado_wsgi.py
+++ b/cps/tornado_wsgi.py
@@ -16,15 +16,15 @@
 #  You should have received a copy of the GNU General Public License
 #  along with this program. If not, see <http://www.gnu.org/licenses/>.
 
-
 from tornado.wsgi import WSGIContainer
 import tornado
 
 from tornado import escape
 from tornado import httputil
+from tornado.ioloop import IOLoop
 
 from typing import List, Tuple, Optional, Callable, Any, Dict, Text
-from types import TracebackType
+from types import TracebackType, FunctionType
 import typing
 
 if typing.TYPE_CHECKING:
@@ -34,61 +34,67 @@ if typing.TYPE_CHECKING:
 class MyWSGIContainer(WSGIContainer):
 
     def __call__(self, request: httputil.HTTPServerRequest) -> None:
-        data = {}  # type: Dict[str, Any]
-        response = []  # type: List[bytes]
+        if tornado.version_info > (6, 2, 0, 0):
+            data = {}  # type: Dict[str, Any]
+            response = []  # type: List[bytes]
 
-        def start_response(
-            status: str,
-            headers: List[Tuple[str, str]],
-            exc_info: Optional[
-                Tuple[
-                    "Optional[Type[BaseException]]",
-                    Optional[BaseException],
-                    Optional[TracebackType],
-                ]
-            ] = None,
-        ) -> Callable[[bytes], Any]:
-            data["status"] = status
-            data["headers"] = headers
-            return response.append
+            def start_response(
+                status: str,
+                headers: List[Tuple[str, str]],
+                exc_info: Optional[
+                    Tuple[
+                        "Optional[Type[BaseException]]",
+                        Optional[BaseException],
+                        Optional[TracebackType],
+                    ]
+                ] = None,
+            ) -> Callable[[bytes], Any]:
+                data["status"] = status
+                data["headers"] = headers
+                return response.append
 
-        app_response = self.wsgi_application(
-            MyWSGIContainer.environ(request), start_response
-        )
-        try:
-            response.extend(app_response)
-            body = b"".join(response)
-        finally:
-            if hasattr(app_response, "close"):
-                app_response.close()  # type: ignore
-        if not data:
-            raise Exception("WSGI app did not call start_response")
+            app_response = self.wsgi_application(
+                MyWSGIContainer.environ(self, request), start_response
+            )
+            try:
+                response.extend(app_response)
+                body = b"".join(response)
+            finally:
+                if hasattr(app_response, "close"):
+                    app_response.close()  # type: ignore
+            if not data:
+                raise Exception("WSGI app did not call start_response")
 
-        status_code_str, reason = data["status"].split(" ", 1)
-        status_code = int(status_code_str)
-        headers = data["headers"]  # type: List[Tuple[str, str]]
-        header_set = set(k.lower() for (k, v) in headers)
-        body = escape.utf8(body)
-        if status_code != 304:
-            if "content-length" not in header_set:
-                headers.append(("Content-Length", str(len(body))))
-            if "content-type" not in header_set:
-                headers.append(("Content-Type", "text/html; charset=UTF-8"))
-        if "server" not in header_set:
-            headers.append(("Server", "TornadoServer/%s" % tornado.version))
+            status_code_str, reason = data["status"].split(" ", 1)
+            status_code = int(status_code_str)
+            headers = data["headers"]  # type: List[Tuple[str, str]]
+            header_set = set(k.lower() for (k, v) in headers)
+            body = escape.utf8(body)
+            if status_code != 304:
+                if "content-length" not in header_set:
+                    headers.append(("Content-Length", str(len(body))))
+                if "content-type" not in header_set:
+                    headers.append(("Content-Type", "text/html; charset=UTF-8"))
+            if "server" not in header_set:
+                headers.append(("Server", "TornadoServer/%s" % tornado.version))
 
-        start_line = httputil.ResponseStartLine("HTTP/1.1", status_code, reason)
-        header_obj = httputil.HTTPHeaders()
-        for key, value in headers:
-            header_obj.add(key, value)
-        assert request.connection is not None
-        request.connection.write_headers(start_line, header_obj, chunk=body)
-        request.connection.finish()
-        self._log(status_code, request)
+            start_line = httputil.ResponseStartLine("HTTP/1.1", status_code, reason)
+            header_obj = httputil.HTTPHeaders()
+            for key, value in headers:
+                header_obj.add(key, value)
+            assert request.connection is not None
+            request.connection.write_headers(start_line, header_obj, chunk=body)
+            request.connection.finish()
+            self._log(status_code, request)
+        else:
+            IOLoop.current().spawn_callback(self.handle_request, request)
 
-    @staticmethod
-    def environ(request: httputil.HTTPServerRequest) -> Dict[Text, Any]:
-        environ = WSGIContainer.environ(request)
+
+    def environ(self, request: httputil.HTTPServerRequest) -> Dict[Text, Any]:
+        if isinstance(WSGIContainer.environ, FunctionType):
+            environ = WSGIContainer.environ(self, request)
+        else:
+            environ = WSGIContainer.environ(request)
         environ['RAW_URI'] = request.path
         return environ
 
diff --git a/optional-requirements.txt b/optional-requirements.txt
index ff02d04f..45f842eb 100644
--- a/optional-requirements.txt
+++ b/optional-requirements.txt
@@ -1,31 +1,31 @@
 # GDrive Integration
-google-api-python-client>=1.7.11,<2.90.0
-gevent>20.6.0,<23.0.0
+google-api-python-client>=1.7.11,<2.98.0
+gevent>20.6.0,<24.0.0
 greenlet>=0.4.17,<2.1.0
 httplib2>=0.9.2,<0.23.0
 oauth2client>=4.0.0,<4.1.4
 uritemplate>=3.0.0,<4.2.0
 pyasn1-modules>=0.0.8,<0.4.0
 pyasn1>=0.1.9,<0.6.0
-PyDrive2>=1.3.1,<1.16.0
-PyYAML>=3.12
+PyDrive2>=1.3.1,<1.18.0
+PyYAML>=3.12,<6.1
 rsa>=3.4.2,<4.10.0
 
 # Gmail
-google-auth-oauthlib>=0.4.3,<0.9.0
-google-api-python-client>=1.7.11,<2.90.0
+google-auth-oauthlib>=0.4.3,<1.1.0
+google-api-python-client>=1.7.11,<2.98.0
 
 # goodreads
 goodreads>=0.3.2,<0.4.0
-python-Levenshtein>=0.12.0,<0.21.0
+python-Levenshtein>=0.12.0,<0.22.0
 
 # ldap login
 python-ldap>=3.0.0,<3.5.0
 Flask-SimpleLDAP>=1.4.0,<1.5.0
 
 # oauth
-Flask-Dance>=2.0.0,<6.3.0
-SQLAlchemy-Utils>=0.33.5,<0.40.0
+Flask-Dance>=2.0.0,<7.1.0
+SQLAlchemy-Utils>=0.33.5,<0.42.0
 
 # metadata extraction
 rarfile>=3.2
@@ -33,12 +33,12 @@ scholarly>=1.2.0,<1.8
 markdown2>=2.0.0,<2.5.0
 html2text>=2020.1.16,<2022.1.1
 python-dateutil>=2.1,<2.9.0
-beautifulsoup4>=4.0.1,<4.12.0
-faust-cchardet>=2.1.18
+beautifulsoup4>=4.0.1,<4.13.0
+faust-cchardet>=2.1.18,<2.1.20
 
 # Comics
 natsort>=2.2.0,<8.4.0
 comicapi>=2.2.0,<3.3.0
 
 # Kobo integration
-jsonschema>=3.2.0,<4.18.0
+jsonschema>=3.2.0,<4.20.0
diff --git a/requirements.txt b/requirements.txt
index fef4bbf2..b12424cc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,19 +1,19 @@
 APScheduler>=3.6.3,<3.11.0
 Babel>=1.3,<3.0
-Flask-Babel>=0.11.1,<3.1.0
+Flask-Babel>=0.11.1,<3.2.0
 Flask-Login>=0.3.2,<0.6.3
 Flask-Principal>=0.3.2,<0.5.1
 Flask>=1.0.2,<2.4.0
 iso-639>=0.4.5,<0.5.0
-PyPDF>=3.0.0,<3.8.0
+PyPDF>=3.0.0,<3.16.0
 pytz>=2016.10
-requests>=2.11.1,<2.29.0
+requests>=2.28.0,<2.32.0
 SQLAlchemy>=1.3.0,<2.0.0
-tornado>=4.1,<6.3
+tornado>=6.3,<6.4
 Wand>=0.4.4,<0.7.0
 unidecode>=0.04.19,<1.4.0
 lxml>=3.8.0,<5.0.0
 flask-wtf>=0.14.2,<1.2.0
 chardet>=3.0.0,<4.1.0
 advocate>=1.0.0,<1.1.0
-Flask-Limiter>=2.3.0,<3.4.0
+Flask-Limiter>=2.3.0,<3.5.0