diff --color -ur go-connections-0.4.0.orig/tlsconfig/config_test.go go-connections-0.4.0/tlsconfig/config_test.go
--- go-connections-0.4.0.orig/tlsconfig/config_test.go	2018-02-28 08:10:15.000000000 -0600
+++ go-connections-0.4.0/tlsconfig/config_test.go	2022-01-25 11:55:14.387244420 -0600
@@ -13,36 +13,40 @@ import (
 )
 
 // This is the currently active Let’s Encrypt R3 (RSA 2048, O = Let's Encrypt, CN = R3)
-// cross-signed CA Intermediate cert, downloaded from: https://letsencrypt.org/certs/lets-encrypt-r3-cross-signed.pem
-// It expires Sep 29 19:21:40 2021 GMT
+// CA Intermediate cert, downloaded from: https://letsencrypt.org/certs/lets-encrypt-r3.pem
+// It expires Sep 15 16:00:00 2025 GMT
 // download updated versions from https://letsencrypt.org/certificates/
 const (
 	systemRootTrustedCert = `
 -----BEGIN CERTIFICATE-----
-MIIEZTCCA02gAwIBAgIQQAF1BIMUpMghjISpDBbN3zANBgkqhkiG9w0BAQsFADA/
-MSQwIgYDVQQKExtEaWdpdGFsIFNpZ25hdHVyZSBUcnVzdCBDby4xFzAVBgNVBAMT
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-/xMY6pgJdz+dU/nPAeX1pnAXFK9jpP+Zs5Od3FOnBv5IhR2haa4ldbsTzFID9e1R
-oYvbFQIDAQABo4IBaDCCAWQwEgYDVR0TAQH/BAgwBgEB/wIBADAOBgNVHQ8BAf8E
-BAMCAYYwSwYIKwYBBQUHAQEEPzA9MDsGCCsGAQUFBzAChi9odHRwOi8vYXBwcy5p
-ZGVudHJ1c3QuY29tL3Jvb3RzL2RzdHJvb3RjYXgzLnA3YzAfBgNVHSMEGDAWgBTE
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-Y3J5cHQub3JnMDwGA1UdHwQ1MDMwMaAvoC2GK2h0dHA6Ly9jcmwuaWRlbnRydXN0
-LmNvbS9EU1RST09UQ0FYM0NSTC5jcmwwHQYDVR0OBBYEFBQusxe3WFbLrlAJQOYf
-r52LFMLGMB0GA1UdJQQWMBQGCCsGAQUFBwMBBggrBgEFBQcDAjANBgkqhkiG9w0B
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-UdHkhVNcsAKX1H7GNNLOEADksd86wuoXvg==
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+FHm0WeZ7tuXkAXOACIjIGlj26ZtuMDIGCCsGAQUFBwEBBCYwJDAiBggrBgEFBQcw
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+PTNlclQtgaDqw+34IL9fzLdwALduO/ZelN7kIJ+m74uyA+eitRY8kc607TkC53wl
+ikfmZW4/RvTZ8M6UK+5UzhK8jCdLuMGYL6KvzXGRSgi3yLgjewQtCPkIVz6D2QQz
+CkcheAmCJ8MqyJu5zlzyZMjAvnnAT45tRAxekrsu94sQ4egdRCnbWSDtY7kh+BIm
+lJNXoB1lBMEKIq4QDUOXoRgffuDghje1WrG9ML+Hbisq/yFOGwXD9RiX8F6sw6W4
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+MldlTTKB3zhThV1+XWYp6rjd5JW1zbVWEkLNxE7GJThEUG3szgBVGP7pSWTUTsqX
+nLRbwHOoq7hHwg==
 -----END CERTIFICATE-----
 `
 	rsaPrivateKeyFile             = "fixtures/key.pem"