diff --git a/CHANGES.md b/CHANGES.md
index 29b67a8..dd7629f 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -9,7 +9,7 @@
 * Update Apprise 0.8.0 (6aa52c3) to 0.8.5 (55a2edc)
 * Update attr 19.2.0.dev0 (daf2bc8) to 20.1.0.dev0 (4bd6827)
 * Update Beautiful Soup 4.8.1 (r540) to 4.8.2 (r559)
-* Update Certifi 2019.06.16 (84dc766) to 2019.11.28 (21abb9b)
+* Update Certifi 2019.06.16 (84dc766) to 2020.04.05.1 (5efdd48)
 * Update dateutil 2.8.1 (fc9b162) to 2.8.1 (16e9c62)
 * Update DiskCache library 4.0.0 (2c79bb9) to 4.1.0 (b0451e0)
 * Update feedparser 6.0.0b1 (d12d3bd) to feedparser_py2 6.0.0b3 (7e255f0)
@@ -44,6 +44,7 @@
 * Update attr 19.2.0.dev0 (daf2bc8) to 20.1.0.dev0 (9b5e988)
 * Update Beautiful Soup 4.8.1 (r540) to 4.8.2 (r554)
 * Update Beautiful Soup 4.8.2 (r544) to 4.8.2 (r556)
+* Update Certifi 2019.06.16 (84dc766) to 2019.11.28 (21abb9b)
 * Update dateutil 2.8.1 (fc9b162) to 2.8.1 (110a09b)
 * Update Requests library 2.22.0 (3d968ff) to 2.22.0 (d2f65af)
 * Update Tornado_py3 Web Server 6.0.3 (ff985fe) to 6.1.dev1 (18b653c)
diff --git a/lib/certifi/__init__.py b/lib/certifi/__init__.py
index 0d59a05..1e2dfac 100644
--- a/lib/certifi/__init__.py
+++ b/lib/certifi/__init__.py
@@ -1,3 +1,3 @@
-from .core import where
+from .core import contents, where
 
-__version__ = "2019.11.28"
+__version__ = "2020.04.05.1"
diff --git a/lib/certifi/__main__.py b/lib/certifi/__main__.py
index 5f1da0d..8945b5d 100644
--- a/lib/certifi/__main__.py
+++ b/lib/certifi/__main__.py
@@ -1,2 +1,12 @@
-from certifi import where
-print(where())
+import argparse
+
+from certifi import contents, where
+
+parser = argparse.ArgumentParser()
+parser.add_argument("-c", "--contents", action="store_true")
+args = parser.parse_args()
+
+if args.contents:
+    print(contents())
+else:
+    print(where())
diff --git a/lib/certifi/cacert.pem b/lib/certifi/cacert.pem
index a4758ef..ece147c 100644
--- a/lib/certifi/cacert.pem
+++ b/lib/certifi/cacert.pem
@@ -2140,6 +2140,45 @@ t/2jioSgrGK+KwmHNPBqAbubKVY8/gA3zyNs8U6qtnRGEmyR7jTV7JqR50S+kDFy
 SjnRBUkLp7Y3gaVdjKozXoEofKd9J+sAro03
 -----END CERTIFICATE-----
 
+# Issuer: CN=EC-ACC O=Agencia Catalana de Certificacio (NIF Q-0801176-I) OU=Serveis Publics de Certificacio/Vegeu https://www.catcert.net/verarrel (c)03/Jerarquia Entitats de Certificacio Catalanes
+# Subject: CN=EC-ACC O=Agencia Catalana de Certificacio (NIF Q-0801176-I) OU=Serveis Publics de Certificacio/Vegeu https://www.catcert.net/verarrel (c)03/Jerarquia Entitats de Certificacio Catalanes
+# Label: "EC-ACC"
+# Serial: -23701579247955709139626555126524820479
+# MD5 Fingerprint: eb:f5:9d:29:0d:61:f9:42:1f:7c:c2:ba:6d:e3:15:09
+# SHA1 Fingerprint: 28:90:3a:63:5b:52:80:fa:e6:77:4c:0b:6d:a7:d6:ba:a6:4a:f2:e8
+# SHA256 Fingerprint: 88:49:7f:01:60:2f:31:54:24:6a:e2:8c:4d:5a:ef:10:f1:d8:7e:bb:76:62:6f:4a:e0:b7:f9:5b:a7:96:87:99
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+
 # Issuer: CN=Hellenic Academic and Research Institutions RootCA 2011 O=Hellenic Academic and Research Institutions Cert. Authority
 # Subject: CN=Hellenic Academic and Research Institutions RootCA 2011 O=Hellenic Academic and Research Institutions Cert. Authority
 # Label: "Hellenic Academic and Research Institutions RootCA 2011"
diff --git a/lib/certifi/core.py b/lib/certifi/core.py
index 7271acf..56b52a3 100644
--- a/lib/certifi/core.py
+++ b/lib/certifi/core.py
@@ -4,12 +4,27 @@
 certifi.py
 ~~~~~~~~~~
 
-This module returns the installation location of cacert.pem.
+This module returns the installation location of cacert.pem or its contents.
 """
 import os
 
+try:
+    from importlib.resources import read_text
+except ImportError:
+    # This fallback will work for Python versions prior to 3.7 that lack the
+    # importlib.resources module but relies on the existing `where` function
+    # so won't address issues with environments like PyOxidizer that don't set
+    # __file__ on modules.
+    def read_text(_module, _path, encoding="ascii"):
+        with open(where(), "r", encoding=encoding) as data:
+            return data.read()
+
 
 def where():
     f = os.path.dirname(__file__)
 
-    return os.path.join(f, 'cacert.pem')
+    return os.path.join(f, "cacert.pem")
+
+
+def contents():
+    return read_text("certifi", "cacert.pem", encoding="ascii")