diff --git a/go.mod b/go.mod
index 76e7a779..8a0d4f25 100644
--- a/go.mod
+++ b/go.mod
@@ -6,7 +6,7 @@ require (
 	github.com/Masterminds/sprig/v3 v3.1.0
 	github.com/alecthomas/chroma v0.8.0
 	github.com/aryann/difflib v0.0.0-20170710044230-e206f873d14a
-	github.com/caddyserver/certmagic v0.12.1-0.20201021150819-90d1550af48c
+	github.com/caddyserver/certmagic v0.12.1-0.20201112220015-12df2be5a021
 	github.com/dustin/go-humanize v1.0.1-0.20200219035652-afde56e7acac
 	github.com/go-chi/chi v4.1.2+incompatible
 	github.com/google/cel-go v0.5.1
diff --git a/go.sum b/go.sum
index a18b0928..294ecccc 100644
--- a/go.sum
+++ b/go.sum
@@ -85,8 +85,8 @@ github.com/bombsimon/wsl/v2 v2.0.0/go.mod h1:mf25kr/SqFEPhhcxW1+7pxzGlW+hIl/hYTK
 github.com/boombuler/barcode v1.0.0/go.mod h1:paBWMcWSl3LHKBqUq+rly7CNSldXjb2rDl3JlRe0mD8=
 github.com/bradfitz/go-smtpd v0.0.0-20170404230938-deb6d6237625/go.mod h1:HYsPBTaaSFSlLx/70C2HPIMNZpVV8+vt/A+FMnYP11g=
 github.com/buger/jsonparser v0.0.0-20181115193947-bf1c66bbce23/go.mod h1:bbYlZJ7hK1yFx9hf58LP0zeX7UjIGs20ufpu3evjr+s=
-github.com/caddyserver/certmagic v0.12.1-0.20201021150819-90d1550af48c h1:IvUz1LXmHL2y3UVGbzmnvz5/2CA1rvurJA/AL4reKKI=
-github.com/caddyserver/certmagic v0.12.1-0.20201021150819-90d1550af48c/go.mod h1:tr26xh+9fY5dN0J6IPAlMj07qpog22PJKa7Nw7j835U=
+github.com/caddyserver/certmagic v0.12.1-0.20201112220015-12df2be5a021 h1:VY4JahIicW/GT84KoIm+TSKwMHj08NyPJhsGypTWJn4=
+github.com/caddyserver/certmagic v0.12.1-0.20201112220015-12df2be5a021/go.mod h1:tr26xh+9fY5dN0J6IPAlMj07qpog22PJKa7Nw7j835U=
 github.com/census-instrumentation/opencensus-proto v0.2.0/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
 github.com/cespare/xxhash v1.1.0 h1:a6HrQnmkObjyL+Gs60czilIUGqrzKutQD6XZog3p+ko=
diff --git a/modules/caddytls/acmeissuer.go b/modules/caddytls/acmeissuer.go
index b73b34ff..6466229d 100644
--- a/modules/caddytls/acmeissuer.go
+++ b/modules/caddytls/acmeissuer.go
@@ -74,6 +74,11 @@ type ACMEIssuer struct {
 	// is internal or for development/testing purposes.
 	TrustedRootsPEMFiles []string `json:"trusted_roots_pem_files,omitempty"`
 
+	// List of preferred certificate chains, by issuer's CommonName. If empty,
+	// or if no matching chain is found, the first chain offered by the server
+	// will be used.
+	PreferredChains []string `json:"preferred_chains,omitempty"`
+
 	rootPool *x509.CertPool
 	template certmagic.ACMEManager
 	magic    *certmagic.Config
@@ -149,6 +154,7 @@ func (iss *ACMEIssuer) makeIssuerTemplate() (certmagic.ACMEManager, error) {
 		CertObtainTimeout: time.Duration(iss.ACMETimeout),
 		TrustedRoots:      iss.rootPool,
 		ExternalAccount:   iss.ExternalAccount,
+		PreferredChains:   iss.PreferredChains,
 		Logger:            iss.logger,
 	}