diff --git a/README.md b/README.md
index f736baef..9e2cc4fa 100644
--- a/README.md
+++ b/README.md
@@ -474,6 +474,7 @@ Additional information for v31.2 release:
   * [GetVersion](api/cefpython.md#getversion)
   * [Initialize](api/cefpython.md#initialize)
   * [IsThread](api/cefpython.md#isthread)
+  * [LoadCrlSetsFile](api/cefpython.md#loadcrlsetsfile)
   * [MessageLoop](api/cefpython.md#messageloop)
   * [MessageLoopWork](api/cefpython.md#messageloopwork)
   * [PostTask](api/cefpython.md#posttask)
diff --git a/api/API-index.md b/api/API-index.md
index 050fb753..9946b5b5 100644
--- a/api/API-index.md
+++ b/api/API-index.md
@@ -162,6 +162,7 @@
   * [GetVersion](cefpython.md#getversion)
   * [Initialize](cefpython.md#initialize)
   * [IsThread](cefpython.md#isthread)
+  * [LoadCrlSetsFile](cefpython.md#loadcrlsetsfile)
   * [MessageLoop](cefpython.md#messageloop)
   * [MessageLoopWork](cefpython.md#messageloopwork)
   * [PostTask](cefpython.md#posttask)
diff --git a/api/cefpython.md b/api/cefpython.md
index efeed621..239bf400 100644
--- a/api/cefpython.md
+++ b/api/cefpython.md
@@ -21,6 +21,7 @@ Table of contents:
   * [GetVersion](#getversion)
   * [Initialize](#initialize)
   * [IsThread](#isthread)
+  * [LoadCrlSetsFile](#loadcrlsetsfile)
   * [MessageLoop](#messageloop)
   * [MessageLoopWork](#messageloopwork)
   * [PostTask](#posttask)
@@ -200,6 +201,22 @@ CEF maintains multiple internal threads that are used for handling different typ
 See PostTask() for a list of threads.
 
 
+### LoadCrlSetsFile
+
+| Parameter | Type |
+| --- | --- |
+| path | bytes |
+| __Return__ | bool |
+
+Description from upstream CEF:
+> Loads the existing "Certificate Revocation Lists" file that is managed by
+> Google Chrome. This file can generally be found in Chrome's User Data
+> directory (e.g. "C:\Users\[User]\AppData\Local\Google\Chrome\User Data\" on
+> Windows) and is updated periodically by Chrome's component updater service.
+> Must be called in the browser process after the context has been initialized.
+> See https://dev.chromium.org/Home/chromium-security/crlsets for background.
+
+
 ### MessageLoop
 
 | | |
diff --git a/src/cef_v59..v66_changes.txt b/src/cef_v59..v66_changes.txt
index a0429e0c..e6dbfb2c 100644
--- a/src/cef_v59..v66_changes.txt
+++ b/src/cef_v59..v66_changes.txt
@@ -134,7 +134,7 @@ cef_extension_handler.h
 - CefExtensionHandler
 
 cef_file_util.h
-- CefLoadCRLSetsFile
++ CefLoadCRLSetsFile
 
 cef_request_handler.h
 - CanGetCookies
diff --git a/src/cefpython.pyx b/src/cefpython.pyx
index cf7d7e46..5a526bcd 100644
--- a/src/cefpython.pyx
+++ b/src/cefpython.pyx
@@ -300,6 +300,7 @@ from main_message_loop cimport *
 # noinspection PyUnresolvedReferences
 from cef_views cimport *
 from cef_log cimport *
+from cef_file_util cimport *
 
 # -----------------------------------------------------------------------------
 # GLOBAL VARIABLES
@@ -1019,3 +1020,6 @@ cpdef dict GetVersion():
         cef_commit_hash=__cef_commit_hash__,
         cef_commit_number=__cef_commit_number__,
     )
+
+cpdef LoadCrlSetsFile(py_string path):
+    CefLoadCRLSetsFile(PyToCefStringValue(path))
diff --git a/src/extern/cef/cef_file_util.pxd b/src/extern/cef/cef_file_util.pxd
new file mode 100644
index 00000000..52e62580
--- /dev/null
+++ b/src/extern/cef/cef_file_util.pxd
@@ -0,0 +1,8 @@
+# Copyright (c) 2018 CEF Python, see the Authors file.
+# All rights reserved. Licensed under BSD 3-clause license.
+# Project website: https://github.com/cztomczak/cefpython
+
+from cef_string cimport CefString
+
+cdef extern from "include/cef_file_util.h":
+    void CefLoadCRLSetsFile(const CefString& path)
diff --git a/src/utils.pyx b/src/utils.pyx
index 03bfd1e3..0e499554 100644
--- a/src/utils.pyx
+++ b/src/utils.pyx
@@ -3,6 +3,7 @@
 # Project website: https://github.com/cztomczak/cefpython
 
 include "cefpython.pyx"
+include "string_utils.pyx"
 
 # noinspection PyUnresolvedReferences
 cimport cef_types
diff --git a/unittests/main_test.py b/unittests/main_test.py
index 3ffd1d4f..0640b2d3 100644
--- a/unittests/main_test.py
+++ b/unittests/main_test.py
@@ -11,6 +11,7 @@
 
 from cefpython3 import cefpython as cef
 
+import glob
 import os
 import sys
 
@@ -126,15 +127,39 @@ def test_main(self):
         # Test initialization of CEF
         settings = {
             "debug": False,
-            "log_severity": cef.LOGSEVERITY_ERROR,
+            "log_severity": cef.LOGSEVERITY_WARNING,
             "log_file": "",
         }
         if "--debug" in sys.argv:
             settings["debug"] = True
             settings["log_severity"] = cef.LOGSEVERITY_INFO
+        if "--debug-warning" in sys.argv:
+            settings["debug"] = True
+            settings["log_severity"] = cef.LOGSEVERITY_WARNING
         cef.Initialize(settings)
         subtest_message("cef.Initialize() ok")
 
+        # CRL set file
+        certrevoc_dir = ""
+        if WINDOWS:
+            certrevoc_dir = r"C:\localappdata\Google\Chrome\User Data" \
+                            r"\CertificateRevocation"
+        elif LINUX:
+            certrevoc_dir = r"/home/*/.config/google-chrome" \
+                            r"/CertificateRevocation"
+        elif MAC:
+            certrevoc_dir = r"/Users/*/Library/Application Support/Google" \
+                            r"/Chrome/CertificateRevocation"
+        if os.path.exists(certrevoc_dir):
+            crlset_files = glob.iglob(os.path.join(certrevoc_dir, "*",
+                                                   "crl-set"))
+            crlset = ""
+            for crlset in crlset_files:
+                pass
+            if os.path.exists(crlset):
+                cef.LoadCrlSetsFile(crlset)
+                subtest_message("cef.LoadCrlSetsFile ok")
+
         # High DPI on Windows
         if WINDOWS:
             self.assertIsInstance(cef.DpiAware.GetSystemDpi(), tuple)