diff --git a/go.mod b/go.mod
index c2e85c4..a25a718 100644
--- a/go.mod
+++ b/go.mod
@@ -6,7 +6,7 @@ require (
 	github.com/emersion/go-smtp v0.21.3
 	github.com/go-ozzo/ozzo-validation/v4 v4.3.0
 	github.com/kelseyhightower/envconfig v1.4.0
-	github.com/mailgun/mailgun-go/v4 v4.12.0
+	github.com/mailgun/mailgun-go/v4 v4.14.0
 	github.com/pkg/errors v0.9.1
 	github.com/prometheus/client_golang v1.19.1
 	github.com/sirupsen/logrus v1.9.3
diff --git a/go.sum b/go.sum
index f4fd85a..a6fc824 100644
--- a/go.sum
+++ b/go.sum
@@ -36,8 +36,8 @@ github.com/kr/pretty v0.3.1 h1:flRD4NNwYAUpkphVc1HcthR4KEIFJ65n8Mw5qdRn3LE=
 github.com/kr/pretty v0.3.1/go.mod h1:hoEshYVHaxMs3cyo3Yncou5ZscifuDolrwPKZanG3xk=
 github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
 github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
-github.com/mailgun/mailgun-go/v4 v4.12.0 h1:TtuQCgqSp4cB6swPxP5VF/u4JeeBIAjTdpuQ+4Usd/w=
-github.com/mailgun/mailgun-go/v4 v4.12.0/go.mod h1:L9s941Lgk7iB3TgywTPz074pK2Ekkg4kgbnAaAyJ2z8=
+github.com/mailgun/mailgun-go/v4 v4.14.0 h1:N9GMNs0XUq5nn3v2TlZHCknF9khSh88MkA1hdRm1o7I=
+github.com/mailgun/mailgun-go/v4 v4.14.0/go.mod h1:L9s941Lgk7iB3TgywTPz074pK2Ekkg4kgbnAaAyJ2z8=
 github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd h1:TRLaZ9cD/w8PVh93nsPXa1VrQ6jlwL5oN8l14QlcNfg=
 github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd/go.mod h1:6dJC0mAP4ikYIbvyc7fijjWJddQyLn8Ig3JB5CqoB9Q=