diff --git a/tools/idf_tools.py b/tools/idf_tools.py
index a2564fd325..11216ed92e 100755
--- a/tools/idf_tools.py
+++ b/tools/idf_tools.py
@@ -190,8 +190,8 @@ CURRENT_PLATFORM = Platforms.get(PYTHON_PLATFORM)
 EXPORT_SHELL = 'shell'
 EXPORT_KEY_VALUE = 'key-value'
 
-# "DigiCert Global Root CA"
-DIGICERT_ROOT_CERT = u"""
+# the older "DigiCert Global Root CA" certificate used with github.com
+DIGICERT_ROOT_CA_CERT = """
 -----BEGIN CERTIFICATE-----
 MIIDrzCCApegAwIBAgIQCDvgVpBCRrGhdWrJWZHHSjANBgkqhkiG9w0BAQUFADBh
 MQswCQYDVQQGEwJVUzEVMBMGA1UEChMMRGlnaUNlcnQgSW5jMRkwFwYDVQQLExB3
@@ -216,6 +216,35 @@ CAUw7C29C79Fv1C5qfPrmAESrciIxpg0X40KPMbp1ZWVbd4=
 -----END CERTIFICATE-----
 """
 
+# the newer "DigiCert Global Root G2" certificate used with dl.espressif.com
+DIGICERT_ROOT_G2_CERT = """
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
+"""
+
+DL_CERT_DICT = {'dl.espressif.com': DIGICERT_ROOT_G2_CERT,
+                'github.com': DIGICERT_ROOT_CA_CERT}
+
 
 global_quiet = False
 global_non_interactive = False
@@ -406,17 +435,15 @@ def download(url, destination):  # type: (str, str) -> None
     info(f'Downloading {url}')
     info(f'Destination: {destination}')
     try:
-        ctx = None
-        # For dl.espressif.com and github.com, add the DigiCert root certificate.
-        # This works around the issue with outdated certificate stores in some installations.
-        if 'dl.espressif.com' in url or 'github.com' in url:
-            try:
+        for site, cert in DL_CERT_DICT.items():
+            # For dl.espressif.com and github.com, add the DigiCert root certificate.
+            # This works around the issue with outdated certificate stores in some installations.
+            if site in url:
                 ctx = ssl.create_default_context()
-                ctx.load_verify_locations(cadata=DIGICERT_ROOT_CERT)
-            except AttributeError:
-                # no ssl.create_default_context or load_verify_locations cadata argument
-                # in Python <=2.7.8
-                pass
+                ctx.load_verify_locations(cadata=cert)
+                break
+        else:
+            ctx = None
 
         urlretrieve_ctx(url, destination, report_progress if not global_non_interactive else None, context=ctx)
         sys.stdout.write('\rDone\n')