diff --git a/MANIFEST.in b/MANIFEST.in
index 3f41f906..4b3eb3ad 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -2,6 +2,7 @@ recursive-include changedetectionio/api *
 recursive-include changedetectionio/templates *
 recursive-include changedetectionio/static *
 recursive-include changedetectionio/model *
+recursive-include changedetectionio/tests *
 include changedetection.py
 global-exclude *.pyc
 global-exclude node_modules
diff --git a/changedetectionio/__init__.py b/changedetectionio/__init__.py
index 74c54095..19873cce 100644
--- a/changedetectionio/__init__.py
+++ b/changedetectionio/__init__.py
@@ -33,7 +33,7 @@ from flask_wtf import CSRFProtect
 from changedetectionio import html_tools
 from changedetectionio.api import api_v1
 
-__version__ = '0.39.20.2'
+__version__ = '0.39.20.3'
 
 datastore = None
 
diff --git a/x b/x
new file mode 100644
index 00000000..5e59f663
--- /dev/null
+++ b/x
@@ -0,0 +1,49 @@
+diff --git a/changedetectionio/__init__.py b/changedetectionio/__init__.py
+index c745dd3e..19873cce 100644
+--- a/changedetectionio/__init__.py
++++ b/changedetectionio/__init__.py
+@@ -819,8 +819,8 @@ def changedetection_app(config=None, datastore_o=None):
+         # Read as binary and force decode as UTF-8
+         # Windows may fail decode in python if we just use 'r' mode (chardet decode exception)
+         try:
+-            with open(newest_file, 'rb') as f:
+-                newest_version_file_contents = f.read().decode('utf-8')
++            with open(newest_file, 'r', encoding='utf-8', errors='ignore') as f:
++                newest_version_file_contents = f.read()
+         except Exception as e:
+             newest_version_file_contents = "Unable to read {}.\n".format(newest_file)
+ 
+@@ -832,8 +832,8 @@ def changedetection_app(config=None, datastore_o=None):
+             previous_file = history[dates[-2]]
+ 
+         try:
+-            with open(previous_file, 'rb') as f:
+-                previous_version_file_contents = f.read().decode('utf-8')
++            with open(previous_file, 'r', encoding='utf-8', errors='ignore') as f:
++                previous_version_file_contents = f.read()
+         except Exception as e:
+             previous_version_file_contents = "Unable to read {}.\n".format(previous_file)
+ 
+@@ -909,7 +909,7 @@ def changedetection_app(config=None, datastore_o=None):
+         timestamp = list(watch.history.keys())[-1]
+         filename = watch.history[timestamp]
+         try:
+-            with open(filename, 'r') as f:
++            with open(filename, 'r', encoding='utf-8', errors='ignore') as f:
+                 tmp = f.readlines()
+ 
+                 # Get what needs to be highlighted
+diff --git a/changedetectionio/model/Watch.py b/changedetectionio/model/Watch.py
+index 9a87ad71..566eb88e 100644
+--- a/changedetectionio/model/Watch.py
++++ b/changedetectionio/model/Watch.py
+@@ -158,7 +158,8 @@ class model(dict):
+ 
+         logging.debug("Saving history text {}".format(snapshot_fname))
+ 
+-        # in /diff/ we are going to assume for now that it's UTF-8 when reading
++        # in /diff/ and /preview/ we are going to assume for now that it's UTF-8 when reading
++        # most sites are utf-8 and some are even broken utf-8
+         with open(snapshot_fname, 'wb') as f:
+             f.write(contents)
+             f.close()