diff --git a/lib/core/agent.py b/lib/core/agent.py
index 15fc96910..e702bc525 100644
--- a/lib/core/agent.py
+++ b/lib/core/agent.py
@@ -5,7 +5,6 @@ Copyright (c) 2006-2019 sqlmap developers (http://sqlmap.org/)
 See the file 'LICENSE' for copying permission
 """
 
-import base64
 import re
 
 from lib.core.common import Backend
@@ -51,6 +50,7 @@ from lib.core.settings import PAYLOAD_DELIMITER
 from lib.core.settings import REPLACEMENT_MARKER
 from lib.core.settings import SINGLE_QUOTE_MARKER
 from lib.core.settings import SLEEP_TIME_MARKER
+from lib.core.settings import UNICODE_ENCODING
 from lib.core.unescaper import unescaper
 from thirdparty import six
 
@@ -171,8 +171,8 @@ class Agent(object):
 
         if re.sub(r" \(.+", "", parameter) in conf.base64Parameter:
             # TODO: support for POST_HINT
-            newValue = encodeBase64(newValue, binary=False)
-            origValue = encodeBase64(origValue, binary=False)
+            newValue = encodeBase64(newValue, binary=False, encoding=conf.encoding or UNICODE_ENCODING)
+            origValue = encodeBase64(origValue, binary=False, encoding=conf.encoding or UNICODE_ENCODING)
 
         if place in (PLACE.URI, PLACE.CUSTOM_POST, PLACE.CUSTOM_HEADER):
             _ = "%s%s" % (origValue, kb.customInjectionMark)
diff --git a/lib/core/common.py b/lib/core/common.py
index 7da5064b8..40df6f83f 100644
--- a/lib/core/common.py
+++ b/lib/core/common.py
@@ -623,7 +623,7 @@ def paramToDict(place, parameters=None):
                 if parameter in (conf.base64Parameter or []):
                     try:
                         oldValue = value
-                        value = decodeBase64(value, binary=False)
+                        value = decodeBase64(value, binary=False, encoding=conf.encoding or UNICODE_ENCODING)
                         parameters = re.sub(r"\b%s(\b|\Z)" % re.escape(oldValue), value, parameters)
                     except:
                         errMsg = "parameter '%s' does not contain " % parameter
diff --git a/lib/core/convert.py b/lib/core/convert.py
index 746908a95..d7f911019 100644
--- a/lib/core/convert.py
+++ b/lib/core/convert.py
@@ -184,7 +184,7 @@ def encodeHex(value, binary=True):
 
     return retVal
 
-def decodeBase64(value, binary=True):
+def decodeBase64(value, binary=True, encoding=None):
     """
     Returns a decoded representation of provided Base64 value
 
@@ -197,11 +197,11 @@ def decodeBase64(value, binary=True):
     retVal = base64.b64decode(value)
 
     if not binary:
-        retVal = getText(retVal)
+        retVal = getText(retVal, encoding)
 
     return retVal
 
-def encodeBase64(value, binary=True):
+def encodeBase64(value, binary=True, encoding=None):
     """
     Returns a decoded representation of provided Base64 value
 
@@ -212,12 +212,12 @@ def encodeBase64(value, binary=True):
     """
 
     if isinstance(value, six.text_type):
-        value = value.encode(UNICODE_ENCODING)
+        value = value.encode(encoding or UNICODE_ENCODING)
 
     retVal = base64.b64encode(value)
 
     if not binary:
-        retVal = getText(retVal)
+        retVal = getText(retVal, encoding)
 
     return retVal
 
@@ -305,7 +305,7 @@ def getUnicode(value, encoding=None, noneToNull=False):
         except UnicodeDecodeError:
             return six.text_type(str(value), errors="ignore")  # encoding ignored for non-basestring instances
 
-def getText(value):
+def getText(value, encoding=None):
     """
     Returns textual value of a given value (Note: not necessary Unicode on Python2)
 
@@ -318,7 +318,7 @@ def getText(value):
     retVal = value
 
     if isinstance(value, six.binary_type):
-        retVal = getUnicode(value)
+        retVal = getUnicode(value, encoding)
 
     if six.PY2:
         try:
diff --git a/lib/core/settings.py b/lib/core/settings.py
index d8afe5599..1917d6795 100644
--- a/lib/core/settings.py
+++ b/lib/core/settings.py
@@ -18,7 +18,7 @@ from lib.core.enums import OS
 from thirdparty.six import unichr as _unichr
 
 # sqlmap version (<major>.<minor>.<month>.<monthly commit>)
-VERSION = "1.3.9.17"
+VERSION = "1.3.9.18"
 TYPE = "dev" if VERSION.count('.') > 2 and VERSION.split('.')[-1] != '0' else "stable"
 TYPE_COLORS = {"dev": 33, "stable": 90, "pip": 34}
 VERSION_STRING = "sqlmap/%s#%s" % ('.'.join(VERSION.split('.')[:-1]) if VERSION.count('.') > 2 and VERSION.split('.')[-1] == '0' else VERSION, TYPE)